An excitable, young Digimon, Herissmon lives in the Protagonists phone, and wants to explore the human world. He is very loyal and caring to his partner.
- Lightning Quills (Lightning Fur): Attacks the opponent by shooting lightning-coated quills.
- Needle-Point Dive (Kenzan Dive): Curls its body up into a ball and charges forth.
Pusumon's Digi-Egg was accidentally created out of Spiral data by the Spiral Hive Mind while attempting to create a self-actualized vessel for the Spirals. However, they discarded the Digi-Egg because they could not integrate with it, and it was eventually found by the Protagonist, who hatched it into Pusumon.
After Rasenmon finally convinces the Hive Mind that they are the same and that the World is more than just sadness, anger, and despair, Rasenmon Fury Mode, who was being controlled by the Hive Mind, and the nearby Spiral stop their rampage and turn into fragments, which then reform into Pusumon's Digi-Egg.
The Digi-Egg remains dormant for several months as the Protagonist takes it around town with Michi Shinjo and Salamon in hopes of triggering its hatching. Fortunately, the egg finally hatches at the Truffle Cafe after the kids jokingly threaten to eat all the treats without him.
Months after reverting back into a Digi-Egg, it hatches once again as Pusumon after the Protagonist and Michi Shinjo tell it that if it didn't hatch, they would eat all the Taiyaki they bought for it.
Pusurimon leaps out of the Protagonist's smartphone to protect them from a Keramon-shaped Spiral. Pusurimon puts up a good fight but is nearly defeated. After encouragement from the Protagonist, Pusurimon digivolves into Herissmon and defeats the Spiral.
Some time after hatching as Pusumon for the second time, it digivolves to Pusurimon again and goes on an overseas vacation with the Protagonist. After they return home and visit the Truffle Cafe a Digital Point opens up, though when Salamon and Elecmon are about to fight the a 4004Y Spiral, Pusurimon stops them and instead tries to talk to it. As Pusurimon asks it why it opened up a Digital Point, wondering if was in trouble, it suddenly is enveloped in a dark aura and attacks Pusurimon— though Salamon takes the blow for the In-Training level Digimon. After it spawns more 4004Y, Pusurimon reluctantly digivolves to Herissmon to fight them.
After SkullGreymon reverts Greymon back to Agumon and paralyses Dorugamon, Gatomon, and Reppamon, Herissmon digivolves into Filmon due to wanting to protect the Protagonist and their friends. The Spiral all freeze up, and Filmon defeats some of the nearby Spiral and then attacks SkullGreymon. The Spirals freezing allows Leomon to join the fight, and the Champion level Digimon fight against SkullGreymon. Agumon then re-joins the fight, digivolves to MetalGreymon, and kills SkullGreymon, after which the Digital Point ends. The group then hope they can meet Tyrannomon once again when it's reborn.
When the Herissmon, the Protagonist, Chihiro Tsukimori, and Lopmon are searching for Terriermon, they find that Terriermon had been fighting the Solarmon type Spiral for fun. This angered the Spiral, which causes them to fuse together into a Tankmon type Spiral, which proves to be too much for Lopmon and Terriermon. Herissmon digivolves to Filmon, and with the help of Lopmon, defeats the Spiral, returning the Digital Point back to normal.
When Herissmon, the Protagonist, Keito Tamada, Elecmon, Michi Shinjo, and Salamon go to the park where Nozomi Tamada and Pumpkinmon were playing when a Digital Point opened up, Herissmon digivolves to Filmon to help fight the Spiral alongside Pumpkinmon, Leomon, and Gatomon. The Digital Point is eventually stopped by GrapLeomon.
When Keito creates an app based on previous Digital Points to help find other Digital Points, it reacts having found a new Digital Point. The Protagonist, Herissmon, Elecmon, and Keito go to the newly found Digital Point, where they find that Takumi and Dorugamon are already fighting the Spiral. As more spawn, Elecmon and Herissmon decide to digivolve to Champion so that they could match the power of the Clockmon type Spiral. Whist fighting, one of the Spiral attacks him, causing Filmon to be unable to move. The Spiral then all group up and attack Filmon, with GrapLeomon and Dorugamon unable to help due to being stuck fighting other Spirals. Filmon's desire to defeat the Spirals to protects his friends causes him to lose control and go berserk, and its rage causes him to defeat the Spirals that were attacking him. A SkullMeramon type Spiral than spawns and attacks him, and Filmon's desire to protect its friends causes him to digivolve to Stefilmon.
When Leomon digivolves to GrapLeomon after a Digital Point expands, causing more powerful Spiral to spawn, Herissmon tries to digivolve to Filmon, though the Protagonist and Keito stop Herissmon from digivolving, worried that Herissmon would go on a rampage again.
When it snows, the group all have a snowball fight, however in the middle of it Herissmon is suddenly enveloped in a dark aura and wanders off. After the group follow Herissmon they discover he had lead them to a Digital Point, in which Frigimon-type Spiral were attacking a Wanyamon and a Motimon. The Spiral split the Digital Point in two and cause the group to be split up, and Herissmon's rage at seeing the In-Training Digimon being attacked causes him to defeat the Spiral, but in the process he harms the In-Training Digimon as well. As more Spiral spawn, Herissmon and Kudamon digivolve to Filmon and Reppamon to fight them. As Filmon fights the endless stream of Spiral, he gives into the rage more and more and when the rest of the group are able to reunite, Filmon attacks Gatomon under the impression that Gatomon was an enemy. As Filmon realises that he attacked Gatomon, the group are surrounded by SkullGreymon-type Spiral and when Reppamon begins to struggle against the remaining Frigimon Spiral, Mayu charges in and tries to help and is attacked - and Filmon, now back to his senses, saves Mayu's life, after which Mayu asks Filmon to support Reppamon in fighting the rest of the Spiral. Filmon and Mayu arrive just in time to save Reppamon's life and Reppamon is surprised to see Mayu risking her life to save it, and digivolves to Chirinmon through the power of their stronger bond. Filmon then digivolves to Stefilmon to help Chirinmon fight the Spiral.
After DoruGreymon is easily defeated by a Chaosdramon in a Digital Point, Takumi asks the group for help and they return to the Digital Point together so they can fight the Chaosdramon and stop it before it attacks the Town. Herissmon digivolves to Filmon, rather than Stefilmon, as they worried about what would happen should Herrismon digivolve to Stefilmon. Filmon fights the Spiral there with the rest of the group and after defeating all the Spiral they find Chaosdramon and DoruGreymon attacks Chaosdramon on its own, however its attacks once again do nothing, though this time DoruGreymon is able to withstand Chaosdramon's attack. As Chaosdramon readies its next attack, Filmon runs in front of it to protect DoruGreymon and after taking the attack, Filmon is overcome by a dark aura and demands more power so that it can protect Takumi and DoruGreymon and despite the protests of the rest of the group, digivolves to Stefilmon.
Worried about the fact that Herissmon would frequently wander off on its own and not remember doing so, the group come to the conclusion that Herissmon's ability to detect Spiral may be the reason and so decide to defeat all the nearby Spiral in the hope it would help Herissmon. Herissmon digivolves to Filmon and teams up with Gatomon, Leomon, and Reppamon to cleanse the nearby Digital Points - however as they continue to clear them out Filmon is surprised attacked by a SkullMeramon Spiral which causes a Digital Point to open up around Filmon, forcing it to digivolve to Stefilmon.
Some time later Herissmon is still being controlled by the Spiral, and they tell it to kill all of its friends and so Herissmon runs away not wanting to do this. As it evades its friends it is found by Nozomi Tamada and Pumpkinmon and the Spiral tell it to kill them. Herissmon refuses and so the Sprial force it to digivolve to Filmon, though Filmon still has enough control to be able to leave, instead of attacking Pumpkinmon, muttering that it's not unneeded as it leaves the park. As it wanders around the City, it finds itself in various Digital Points however the Spiral keep spawning which makes it so that its friends are unable to find it, and at some point the Spiral force Filmon to digivolve to Stefilmon.
After Herissmon's mind awakens from inside Rasenmon Fury Mode it tries to talk to the Spiral Hive Mind and stop it from continuing Fury Mode's rampage, however the Spiral refuse to listen and reject everything Herissmon tells it. Herissmon, with its new found knowledge that it is the Hive Mind's vessel, comes to the conclusion that it should also be able to control the Spiral just like how they had been controlling it and digivolves to Filmon. This angers the Hive Mind, and as the Hive Mind tell Filmon it cannot stop its rampage on its own, Filmon digivolves to Stefilmon.
When Herissmon, the Protagonist, and Tentomon hunt down Diaboromon's avatars in a Digital Point to prevent them from realising in the Real World, Herissmon and Tentomon digivolve to Filmon and Kabuterimon to fight against the Kuramon and Keramon. After Kabuterimon kills some of them, an Infermon spawns. As Filmon and Kabuterimon continue to fight the Keramon and Kuramon, Kabuterimon attempts to Super Digivolve, however Infermon attacks Kabuterimon before it is able to. Filmon then attacks Infermon to buy time for Kabuterimon. This allows Kabuterimon to Super Digivolve to MegaKabuterimon, who then proceeds to defeat Infermon. Since there were still many more avatars however, Filmon Super Digivolves to Stefilmon to fight them.
Months after the Rasenmon Fury Mode incident, no Digital Points have opened due to Herissmon and the Spiral resting within Pusumon's Digi-Egg. After the Digi-Egg hatches, the Spiral are freed and when the Protagonist and Pusurimon return from their vacation a new Digital Point opens up. Pusurimon tries to ask the Spiral why they had opened up a Digital Point however before they can answer they are enveloped in a dark aura and attack the group. As they fight and defeat the Spiral, more powerful ones continuously replace the ones they defeat and so Herrismon eventually has to digivolve to Filmon to be able to defeat them. The Protagonist was initially worried about letting Herrismon digivolve, though it convinces its partner to believe in it and that everything would be okay.
As they travel around the Digital World Mon is about to explain what being the messenger of the Digital World means, however Herissmon suddenly senses a group of Spiral. The group follow Herissmon and find a group of Spiral attacking a group of Gotsumon. Herissmon digivolves to Filmon and defeats them alongside BaoHuckmon and Gatomon.
When Mon and Hackmon ask the group to come to the Digital World to help protect Primary Village from the Spiral, Herissmon digivolves to Filmon to fight them — alongside BaoHuckmon, Reppamon, and Leomon.
When the group decide to go shopping so that they could help teach Mon and Hackmon about the Human World a Digital Point opens up before they can start shopping - so Herissmon, Salamon, Kudamon, and Hackmon digivolve to their Champion forms to defeat the Spirals. A group of Kuwagamon and Okuwamon suddenly arrive, having been dragged into the Digital Point by the Spiral - however before the group can chase them they hear Kazuma Natsuyagi and Botamon in trouble further into the Digital Point and split up to deal with both issues at the same time. Filmon and Gatomon chase after the Insectoid Digimon but eventually lose track of them and later find a Kuwagamon fighting Tapirmon to protect its Partner, Sara Shinkai. Tapirmon digivolves to Monochromon and defeats Kuwagamon, to the shock of the onlooking Tamers and Digimon. After introducing themselves they ask Sara to help them defeat the rest of the Insectoid Digimon - however Sara refuses as she had other plans and so she and Tapirmon leave. Filmon and Gatomon proceed to fight the rest of the Insectoid Digimon and eventually digivolve to Rasenmon and Angewomon.
Some time later another Digital Point opens up with Filmon and Gatomon easily defeating all the Spiral inside. Saramon and Tapirmon arrive just as they finish the last of them off and leave disappointed due to their being no Spiral for them to defeat. More Digital Points suddenly open up, so the dup travel all over the City and quell them all.
When Mon tells the Protagonist, Herissmon, Nozomi and Pumpkinmon that is she now living at the Truffle Cafe a Digital Point suddenly opens and the group are attacked by Spiral. Herissmon digivolves to Filmon and defeats them alongside Pumpkinmon.
When on a trip to the Digital World to fight Spiral, Kazuma tells the group about the times he played basketball with Takumi however during the conversation the group are attacked by a group of Spiral, and so they digivolve to their Champion levels to defeat them. A Spiral-4036Y spawns in front of Kazuma however, and after Kazuma remembers a lesson he learned from Takumi in which he doesn't have to do everything himself, has Grizzlymon flee when it realises it stands no chance at defeating such a powerful Spiral whilst Filmon warp digivolves to Rasenmon.
- Crimson Slash: Whirls in a continuous slashing attack with both claws.
- Lightning Stinger: Skewers the enemy and injects energy into them that destroys their data.
After Filmon goes berserk and loses control whilst fighting a large group of Clockmon type Spiral, a SkullMeramon type Spiral spawns and attacks Filmon, which causes Filmon to digivolve to Stefilmon due to his desire to want to protect his friends. Stefilmon easily defeats the Spiral, however this doesn't calm Stefilmon down who then proceeds to attack his friends during his rampage. As Stefilmon fights GrapLeomon, Dorugamon, and Agumon, the group realise that the Spiral must've done something to Stefilmon, and Takumi states that they may have to kill Stefilmon if he continues to rampage. After the group defeat all the Spiral, the Digital Point disperses and Stefilmon, still rampaging, reverts back to Herissmon and passes out from exhaustion. This rampage causes the group to tell Herissmon not to digivolve any more just in case it goes on a rampage again, and after Dorugamon digivolves to DoruGreymon it tells Herissmon it will deal with Stefilmon should it rampage again in the future.
After Reppamon digivolves to Chirinmon to save a group of In-Training Digimon from a group of Frigimon-type Spiral, Filmon digivolves to Stefilmon and defeats the Spiral alongside Chirinmon. Stefilmon, however starts to feel the influence of the Spiral taking over it again, and Chirinmon tells Stefilmon to revert back to Herissmon, which Stefilmon reluctantly proceeds to do.
After Filmon takes an attack from a Chaosdramon to protect Takumi and DoruGreymon, Filmon is overcome by a dark aura and demands more power so that it can protect the duo and digivolves to Stefilmon - despite the protests of the rest of the group. This pleases the Chaosdramon as it has found an enemy strong enough to rival its power, and Chirinmon and GrapLeomon decide to team up with Stefilmon to fight the Chaosdramon. As they fight, Takumi eventually realises that he can't do everything on his own and that his friends are there to help him, which causes DoruGreymon to digivolve to Gaiomon, and the group team up and eventually kill the Chaosdramon. After Stefilmon de-digivolves back to Herissmon, it states that it heard many voices talking in its head which cause it to lose itself, and Herissmon begins to worry about if its is going to be okay.
After Filmon is surprise attacked by a SkullMeramon Spiral a Digital Point opens up around Filmon and forces it to digivolve to Stefilmon. The Spiral then posses Stefilmon, forcing Stefilmon to go on a rampage. The Spiral's influence increases Stefilmon's power and Stefilmon easily beats down GrapLeomon and Chirinmon. During the battle Gatomon digivolves to Angewomon and uses its "Heaven's Charm" to remove the Spiral's control, however it doesn't last very long and the Spiral possesses Stefilmon again. Chirinmon then uses its "Holy Wave" which fully removes the Spiral's possession, reverting Stefilmon back to Herissmon and ejecting the Spiral out of its body.
After Herissmon runs away due to the Spiral still controlling it and telling it to kill all of its friends, the group split up and try to find it. Some time after the Spiral force Herissmon to digivolve to Filmon, they force it to digivolve once again to Stefilmon, and Stefilmon is found by Michi and Angewomon in a Digital Point. They are unable to reach Stefilmon however, as more and more Spiral spawn to stop them and Stefilmon leaves, not wanting to kill it friends. It is then found by Mayu and Chirinmon, however the Spiral once again stop it from reaching Stefilmon. Eventually the group reconvene and find Stefilmon where the Protagonist and Herissmon first met however the Spiral trick it into thinking that the Protagonist had replaced it as its partner with Agumon and the shock of this causes Stefilmon to become depressed, which allows the Spiral to take control and force Stefilmon to go on a rampage. Stefilmon teams up with the nearby Spiral to fight Gaiomon, Angewomon, GrapLeomon, and Angewomon and during the fight the Spiral all fuse with Stefilmon to become Rasenmon Fury Mode.
After Herissmon's mind awakens from inside Rasenmon Fury Mode it tries to talk to the Spiral Hive Mind and stop it from continuing Fury Mode's rampage, however the Spiral refuse to listen and reject everything Herissmon tells it. Herissmon, with its new found knowledge that it is the Hive Mind's vessel, comes to the conclusion that it should also be able to control the Spiral just like how they had been controlling it and digivolves to Filmon and then Stefilmon. This angers the Hive Mind, which tells Stefilmon it cannot stop the rampage on its own and Stefilmon fights the Hive Mind. As Stefilmon fights, it keeps the image of its friends in its mind and after hearing the Protagonist cheering it on, digivolves to Rasenmon.
When Diaboromon tries to use the Digital Points to allow itself and its avatars to realise in the Real World, Omegamon asks Alphamon for help to deal with it. After Omegamon and Tentomon search for Alphamon, they find it with Herissmon. After explaining the situation, Herissmon and the Protagonist ask to help, and Alphamon asks Omegamon to fight Herissmon so that Herissmon and the Protagonist can learn from Omegamon. Herissmon warp digivolves to Stefilmon and fights Omegamon and after Stefilmon puts all of its power into an attack against Omegamon, Omegamon is impressed and states it has more than enough faith in its partner and battle experience to help Omegamon and Alphamon deal with Diaboromon and its avatars. After Filmon buys time for Kabuterimon to Super Digivolve to MegaKabuterimon, MegaKabuterimon defeats an Infermon avatar, and then Filmon Super Digivolves to Stefilmon to help MegaKabuterimon fight the rest of the Keramon and Kuramon avatars. As they're fighting them, multiple Diaboromon avatars arrive and attack the two Ultimates, however Alphamon suddenly arrives and defeats the Diaboromon avatars saving Stefilmon and MegaKabuterimon. Even more spawn however, and the during the endless battles against the rest of the avatars they find that the Diaboromon slow down when they revive themselves due to the amount of data they have to process, which in turn slows down the real Diaboromon that Omegamon is in the middle of fighting. Eventually Omegamon kills the real Diaboromon thanks to the work of the trio killing so many of the Diaboromon avatars.
When Diaboromon remnants later reappear, Herissmon digivolves to Stefilmon to fight them alongside Rasielmon, but the remnants fuse into Armageddemon in response, defeating the duo and reverting Stefilmon to Herissmon.
Months after the Rasenmon Fury Mode incident, no Digital Points have opened due to Herissmon and the Spiral resting within Pusumon's Digi-Egg. After the Digi-Egg hatches, the Spiral are freed and when the Protagonist and Pusurimon return from their vacation a new Digital Point opens up. Pusurimon tries to ask the Spiral why they had opened up a Digital Point however before they can answer they are enveloped in a dark aura and attack the group. As they fight and defeat the Spiral, more powerful ones continuously replace the ones they defeat and so Herrismon eventually has to digivolve to Filmon and then Stefilmon to be able to defeat them. Eventually the groups Ultimate level Digimon are no match and their attacks do nothing when a group of Spiral-2020B fuse together into a Titamon type Spiral and so Stefilmon digivolves to Rasenmon to fight it.
After being sent to the Digital World through a portal the Protagonist and Herissmon wander around, and are eventually reunited with Michi and Salamon. They defeat a group of Gazimon that assumed the group were trying to steal their homes and later hear the same Gazimon scream in the distance shortly after they had ran away. After arriving at the scene they see the Gazimon being attacked by a Mamemon and so Herrismon and Salamon warp digivolve to Stefilmon and Angewomon to defeat the Mamemon and then agree to help the Gazimon deal with the Mamemon. After dealing with the situation and learning that the Mamemon, and their leader, a Boltmon, had been attacking them as part of their culture - them having been chased out of their own village by Spiral, the group agree to save their village. On the way they run into a Gotsumon village also being attacked by Spiral, where they reunite with Keito and Elecmon. After saving it the group travel to the Mamemon and Boltmon village, however they are ambushed by more Spiral on the way. Stefilmon, GrapLeomon, Angewomon, and BaoHuckmon defeat them however Stefilmon suddenly senses Spiral having spawned inside the Gotsumon village again - but as they still need to save the other village as well - the group split up with Keito returning to the Gotsumon village. Stefilmon then digivolves to Rasenmon to make up for their absence.
When Mon and Hackmon ask the group to come to the Digital World to help protect Primary Village from the Spiral, Herissmon digivolves to Filmon and then Stefilmon to fight them — alongside SaviorHuckmon, Chirinmon, and GrapLeomon.
After the incident at the mall, Stefilmon fights Spirals alongside the other Digimon. Afterward, Stefilmon asks Chirinmon about his new Mega form and GrapLeomon encourages them to try a friendly sparring match like he had recently done. Although hesitant at first, Mayu and Chirinmon acquiesce in order to train further, so Stefilmon digivolves to Rasenmon.
- Giga Crimson Dive: Charges forth whilst doing a high-speed drillspin, cleaving the opponent to bits with its bristled fur and Hurricane Knuckles.
- Vermillion Vortex: Causes red, drill-shaped spears to protrude from all over its body, annihilating multiple enemies in one go.
Rasenmon Fury Mode
Rasenmon Fury Mode is Herissmon's alternate Mega form.
When Herissmon runs away due to the Spirals telling it to kill all of its friends it wanders around the Digital Points managing to evade its friends every time due to countless Spiral spawning and stopping their friends from reaching it. As it does so the Spiral force it to digivolve to Filmon and then Stefilmon and eventually they are able to reach Stefilmon in the area that the Protagonist and Herissmon first met. As Stefilmon fights Gaiomon, Angewomon, Chirinmon, and GrapLeomon alongside the Spiral, they all fuse with Stefilmon and force it to digivolve to Rasenmon Fury Mode. Rasenmon Fury Mode leaves the Digital Point and attempts to destroy the City.
As Rasenmon Fury Mode attacks passersby the group realise they can't fight in the City due to buildings and the nearby people and so try to evacuate the City and find a more safe place to fight. The group distract Fury Mode, who chases them and around, and as it does so, Gaiomon, who chose to evacuate everyone due to being the fastest, is able to evacuate everyone from the City. The group continue to fight Fury Mode, only for a Digital Point to suddenly open up, after which a group of Spiral spawn, leading to group to fight not only Rasenmon but the Spiral as well.
As they continue to fight Rasenmon Fury Mode they notice that Fury Mode was starting to tire and slow down - however Fury Mode absorbs some of the nearby Spiral which re-energises it, restoring it back to full power. As the fight continues, Fury Mode and the remaining Spiral suddenly turn into fragments as Herissmon had awakened inside Fury Mode, digivolved to Rasenmon, and got its message across that the Spiral and Herissmon were the same and that there was more to the World than just sadness and despair. The fragments then form into Pusumon's Digi-Egg.
- Desperate Vortex: Extends its large, spiral-shaped tails and skewers the opponent over and over again.
- Predator's Bite: Pounces on the opponent, devouring their Digicore directly..
Rasenmon is Herissmon's true Mega form.
As the Spiral Hive Mind continues to control Rasenmon Fury Mode, forcing it to go on a rampage to try and kill all of Herissmon's friends and destroy the Town, Herissmon's mind awakens and it tries to convince the Hive Mind that it is the same as Herissmon and that the World is more than just sadness, anger, and despair. The Spiral refuse to listen however and continue to rampage, and Herissmon, with its new found knowledge that it is the Hive Mind's vessel, comes to the conclusion that it should also be able to control the Spiral just like how they had been controlling it and digivolves to Filmon and then Stefilmon. As Stefilmon fights, it keeps the image of its friends in its mind and after hearing the Protagonist cheering it on, digivolves to Rasenmon, attacks the Hive Mind, and finally manages to get its message across. The Hive Mind stops both Fury Mode and the Spiral's rampage and all the Spiral turn back into fragments, however this also causes Rasenmon to turn into fragments as well - which then form into Pusumon's Digi-Egg.
Months after the Rasenmon Fury Mode incident, no Digital Points have opened due to Herissmon and the Spiral resting within Pusumon's Digi-Egg. After the Digi-Egg hatches, the Spiral are freed and when the Protagonist and Pusurimon return from their vacation a new Digital Point opens up. Pusurimon tries to ask the Spiral why they had opened up a Digital Point however before they can answer they are enveloped in a dark aura and attack the group. As they fight and defeat the Spiral, more powerful ones continuously replace the ones they defeat and so Herrismon eventually has to digivolve to Filmon and then Stefilmon to be able to defeat them. Eventually the groups Ultimate level Digimon are no match and their attacks do nothing when a group of Spiral-2020B fuse together into a Titamon type Spiral and so Stefilmon digivolves to Rasenmon to fight it, with GrapLeomon and Angewomon acting as a distraction. This still isn't the end of it however and even more Spiral-2020B spawn though they are all defeated by BaoHuckmon who had just arrived with Mon in search of the Protagonist.
After being sent to the Digital World through a portal the Protagonist and Herissmon wander around, and are eventually reunited with Michi and Salamon. They defeat a group of Gazimon that assumed the group were trying to steal their homes and later hear the same Gazimon scream in the distance shortly after they had ran away. After arriving at the scene they see the Gazimon being attacked by a Mamemon and so Herrismon and Salamon warp digivolve to Stefilmon and Angewomon to defeat the Mamemon. They agree with the Gazimon to help deal with the Mamemon and the Gazimon take them to their secret hideout where they lived with a group of other Digimon that had also been chased out of their homes by the Mamemon. However just as they arrive the Mamemon suddenly attack everyone in the hideout, having just located them. Angewomon and Rasenmon fight the Mamemon and as the duo start to get tired, BaoHuckmon and Mon arrive and BaoHuckmon defeats the remaining Mamemon, forcing them to flee. After Mon explains that the Mamemon had stolen the local Digimon's homes because the Spiral had chased them out of their homes and that chaos like this was common after the Spiral had shown up to the Digital World, the Mamemon return with their boss, a Boltmon. Rasenmon and Angewomon watch as BaoHuckmon digivolves to SaviorHuckmon and defeats the Boltmon after it states that they were simply fighting to see who should be the leader of the forest. As the losers the Boltmon and Mamemon agree to stop forcing their way of lives onto the other Digimon and Mon and SaviorHuckmon state they would get their homes back for them. The local Digimon then invite Boltmon and the Mamemon to live with them until the group of Tamers were able to get their home back for them.
On the way they come across a group of Gotsumon who also had had their village attacked by Spiral. They agree to help them save the village though are surprised to see it had already been saved by Keito and GrapLeomon. Finally reunited they all travel to the Mamemon and Boltmon's village but are attacked by more Spiral on the way. Stefilmon senses that more had spawned in the Gotsumon village so they split up with Keito and GrapLeomon returning to the Gotsumon village. Stefilmon digivolves to Rasenmon to make up for their absence and fights them alongside SaviorHuckmon. As they finally reach the village they come across the same Spiral that had suddenly glitches once before. It turns into its glitched form again, tells Rasenmon not to interfere, and flees. All the other Spiral within the other Digital Points then flee as well, seemingly under the orders of the one Rasenmon had talked to.
Having previously trained with ShineGreymon in their Rookie forms, the Protagonist, Herissmon, Michi Shinjo, and Salamon once again come across ShineGreymon months later whilst in a Digital Point. It had wanted to train with them again having heard that a lot had happened and they had gotten stronger. Herissmon informs it that it can now digivolve to Mega and warp digivolves to Rasenmon, whilst Salamon warp digivolves to Angewomon, Salamon's Ultimate form. Impressed, ShineGreymon digivolves to ShineGreymon BM, its most powerful form, though before they can train a giant Spiral-1004R spawns and so the three team up to take it down as training instead of sparring against ShineGreymon BM. As they celebrate defeating it three more of them spawn and the trio of Spiral manage to break the seal of the Seven Deadly Digimon member Belphemon, freeing it as Belphemon SM. The group attempt to attack SM whilst it's still dormant, however the Spiral keep getting in the way. As they fight against the Spiral, Belphemon SM's alarm clock suddenly sounds which awakens Belphemon SM and causes it to digivolve into Belphemon RM. Its roars were too much for Angewomon to handle, and they also cause Rasenmon large amounts of damage. After a pep talk from ShineGreymon BM they re-join the battle and ShineGreymon BM is eventually able to defeat Belphemon RM, pushing it back into its seal once again. Rasenmon and ShineGreymon then promise to meet again in the future.
As they search for Takumi Hiiragi and Dorumon whilst clearing Digital Points they are unable to find them. GrapLeomon suddenly tells Stefilmon that it can now digivolve to its Mega form, HeavyLeomon, and requests a match against Rasenmon. Stefilmon complies and the two digivolve to their Mega forms and spar.
When Mon and Hackmon ask the group to come to the Digital World to help protect Primary Village from the Spiral, Herissmon digivolves to Filmon, then Stefilmon, and then Rasenmon to fight them — alongside SaviorHuckmon, Chirinmon, and HeavyLeomon. After the group split up Rasenmon and SaviorHuckmon find the original Spiral-4004Y but it spawns a group of Spiral-4036Y and they try to kill them. After Rasenmon and SaviorHuckmon defeat the Spiral-4036Y they are unable to defeat the Spiral-4004Y as it is able to flee. The group then proceed to defeat the rest of the Spiral and save Primary Village.
When the group decide to go shopping so that they could help teach Mon and Hackmon about the Human World a Digital Point opens up before they can start shopping - so Herissmon, Salamon, Kudamon, and Hackmon digivolve to their Champion forms to defeat the Spirals. A group of Kuwagamon and Okuwamon suddenly arrive, having been dragged into the Digital Point by the Spiral - however before the group can chase them they hear Kazuma Natsuyagi and Botamon in trouble further into the Digital Point and split up to deal with both issues at the same time. Filmon and Gatomon chase after the Insectoid Digimon and eventually find them and digivolve to Rasenmon and Angewomon to defeat them. After defeating them Rasenmon senses that a powerful Digimon had arrived in the Digital Point, though are unable to help out the others as a large group of Spiral-2020B, lead by a Spiral-4036Y spawn, and they realise that the Spiral were intentionally stalling them so that they could not help fight the powerful Digimon. Though they are able to defeat the Spiral, they are unable to help the rest of their friends due to how long it took to defeat the Spiral.
After the incident at the mall, Stefilmon and Chirinmon agree to a friendly sparring match in their Mega forms, so Stefilmon digivolves to Rasenmon to fight Mitamamon.
When Kumbhiramon, Vajramon, and Pajiramon ask the group to fight the other Deva to try and gain their trust, as the other Deva did not trust Humans, they find Vikaralamon fighting a group of Spiral in a Digital Point. After it clears out all the Spiral it suddenly attacks the group without warning though is defeated by Rasenmon and Angewomon. Having been defeated, it agrees to trust the Humans and joins the other Human supporting Deva. As the Humans try and catch up with Vikaralamon they suddenly find it being attacked by Machinedramon. Rasenmon and Angewomon fight it to protect their new friend, with Machinedramon setting the forest on fire in the process. As the fight continues Machinedramon suddenly retreats after receiving a message that the retrieval had been complete. Rasenmon, Angewomon, and Vikaralamon manage to put our the forest fire and then join the rest of the Human supporting Deva.
Later, when a Digital Point opens up in the Digital World, Caturamon use one of the DigiCores to open a distortion and have all the Spiral go into it to get them out of the Digital World, as it had done so in the past, but the other Deva disagreed with this as they did not have the Four Holy Beasts any more to supress the power of the distortion, making the plan too dangerous. Caturamon still goes ahead with the plan however, and unable to reach the center of the Digital Point, Sinudramon asks the Tamers to go inside it and stop Caturamon, though first they have to defeat all the nearby Spiral – which Herissmon, Hackmon, and Elecmon start to do after digivolving to Rasenmon, SaviorHuckmon, and HeavyLeomon. Rasenmon and HeavyLeomon continue to fight the Spiral, whilst SaviorHuckmon leaves to help Michi and Sara deal with Caturamon instead, having noticed they had entered the Digital Point through Keito's tracking machine.
Just after Leopardmon defeats Machinedramon and Angewomon in a Digital Point Rasenmon, having just arrived, charges into battle to protect its friends. Relatively equal in power to the Royal Knight, Rasenmon is taken by surprise when it becomes Leopardmon LM and uses its speed to get the upper hand. Just as it was about to deal a powerful blow however, HeavyLeomon arrives and attacks Leopardmon, saving Rasenmon. Leopardmon realises that fighting two Megas may prove tough and as the three of them fight, Leopardmon stops fighting and asks why the two of them are fighting it, then tells them that Saramon and Machinedramon are behind all the problems in the Digital World. Sara confirms this, summons a large group of Spiral to cause a distraction, has Tapirmon digivolve to Machinedramon, and attacks Leopardmon. As Machinedramon and Gaiomon fight Leopardmon, the rest of the group fight the Spiral. They eventually defeat all the Spiral, just as Machinedramon and Gaiomon retreat to the Dark Area after Jesmon joined the fight to even up the numbers.
When Bearmon, Kazuma, the Protagonist, and Herissmon are hanging out at the Truffle Café a Digital Point opens up at Main Street. Herissmon digivolves to Rasenmon and defeats a Spiral-2030B that had surprise attacked Grizzlymon after it had defeated a DemiDevimon. It and Grizzlymon then defeat the rest of the Spiral. They later reunite with everyone further into the Digital Point, after which GranDracmon suddenly ReArises into it and appears before them. It tells them it had spent a long time watching them, and during the time spent watching, it was impressed, and invites them to come to its castle. The Tamers, based on GranDracmon's appearance, assume something is up and are proven right when it states it wants to add them to its ice sculpture collection so that it can keep them in its collection for eternity. The Tamers refuse and a fight ensues, with their attacks doing no damage to it. GranDracmon mocks Mon, stating that she doesn't care about the Human World and whether it gets destroyed though after her friends deny it she remembers when she first met Jesmon and wanted to be strong like it so she could protect everyone. After regaining her resolve, lights come out of her and power up the other Digimon with Rasenmon now a match for GranDracmon. GranDracmon is suddenly attacked by Jesmon and as it mocks Jesmon, due to it having already used up a lot of its energy fighting the decoys in the Dark Area, it is attacked by Rasenmon – with GranDracmon surprised it was still able to fight. GranDracmon, now able to be damaged, retreats though informs the Tamers that it will return – as it had fallen even more in love with them and now wants to make them part of its collection even more.
After Michi is brainwashed by GranDracmon, she goes missing. Three days later, the group search for her and during the search they come across a Digital Point full of Spiral and Evil Digimon, so Herissmon warp digivolves to Rasenmon to fight them. During the fight, GranDracmon separates them all by teleporting them away pair by pair. After Sara summons a group of Spiral, causing the Digital Point to re-appear, the Protagonist and Rasenmon are able to find most of the group and come across Michi and Angewomon trying to destroy the Town. Angewomon attacks Rasenmon and does large amounts of damage, though GranDracmon has Michi flee when Mon and SaviorHuckmon arrive. The group chase after her, though Mon and SaviorHuckmon end up stuck behind when GranDacmon summons VenomMyotismon. As Rasenmon, Grizzlymon and their partners transverse the Dark Area they are attacked by many evil Digimon, though they defeat them all. They eventually find Michi and Angewomon, though Rasenmon has Grizzlymon stay out of the action due to how powerful Angewomon had become as a result of GranDracmon's power, with Angewomon now equal in power to Rasenmon. As the fight continues Angewomon is suddenly surprise attacked by Machinedramon, who proceeds to take over the battle allowing Rasenmon and Grizzlymon to reach GranDracmon. Grizzlymon tries to help Rasenmon fight but is easily defeated by its Mega level opponent and reverts back to Bearmon, with Rasenmon blocking GranDracmon's attempts to freeze them. As GranDracmon prepares to finish them off, LovelyAngemon and Machinedramon charge in and attack GranDracmon – Sara having successfully snapped them out of their brainwashing. GranDracmon attempts to freeze then all for all eternity again, with the three Megas fighting back. As they launch a combined attack, GranDracmon finds LovelyAngemon's light beautiful after which the group suddenly teleport out of the Dark Area and wake up in the real World, the Digimon all back in their Rookie forms. Confused as to what happened, the group theorize that GranDracmon killed itself by running into the light and celebrate their assumed victory.
Rasenmon later spars with LovelyAngemon, like it had with the other Tamers' Mega level Digimon. The spar ends as a draw, with both Digimon reverting to the Rookie forms after running out of energy.
When the groups Champion level Digimon were fighting a group of Spiral, a Spiral-4036Y spawns in front of Kazuma and Grizzlymon and the duo run away after Kazuma remembers a lesson he learned from Takumi in which he doesn't have to do everything himself. Filmon warp digivolves to Rasenmon and BaoHuckmon digivolves to SaviorHuckmon, after which the duo proceed to defeat the Spiral as it chases Kazuma and Grizzlymon.
Sometime after that; Rasenmon, HeavyLeomon, SaviorHuckmon, and Grizzlymon defeat a large amount of Spiral and notice that the amounts they had to defeat were getting lower – though rather than celebrate realise this was most likely because something else was going on. As they clear out more Spiral they find a group attacking a group of Lalamon, though they are "saved" by Sandiramon, who defeated the Spiral whilst simultaneously hurting the Lalamon. The group are mad at this, though a fight is defused when they learn Sandiramon is one of the Deva, after which it informs them that the Four Holy Beasts were awakening and later learn from Kumbhiramon that they were awakening due to the lower amount of Spirals restoring the balance of the Digital World meaning they no longer had to slumber.
A few days later the group try out Eiji's app which he created to allow communication between the Real and Digital Worlds though whilst trying it out they are attacked by a group of Spiral, which the group proceed to defeat – with Herissmon warp digivolving to Rasenmon. They travel the Digital World testing out the app but their tests are stopped when Seraphimon of the Three Archangels and Examon of the Royal Knights fight as a result of the Archangels refusing to help the Royal Knights find Lucemon, with their attacks causing a split in the ground, the Tamers and Partner Digimon falling into it. When the group finally get out of the hole they find Jesmon trying to convince Crusadermon to get the Archangels help by talking to them but Crusadermon laughs stating that wasn't possible and that they had to get into the domain to kill Lucemon and that Seraphimon was obviously sheltering the Demon Lord in its former home. Realising that the Tamers were friends with Takumi and Sara, who had attacked the Digital World with a group of Spiral, Crusadermon decides it would be best to kill the entire group, including Mon, which is enough to spur Jesmon into battle against its fellow Royal Knight. Jesmon sends the rest of the group to fight Examon, then battles Crusasdermon to see which of their ideals was right. Rasenmon attempts to stop the battle, though its cries go unheard. Needing to stop the battle, Rasenmon fires its attacks against the attacks of both Digimon, neutralising them. Noticing their attacks had stopped, the duo notice it wasn't the other that had stopped them and finally notice Rasenmon. Rasenmon is unable to talk them out of fighting and the fight continues, though they stop fighting after Zhuqiaomon awakens and demands to know why they were all fighting each other.
Unsatisfied with the explanations of the quarrelling factions Zhuqiaomon decides to take the matters into its own hands and joins the battle. Mon however is able to stop the fighting, following Eiji's advice, by pointing out that not all members of the groups had let their opinions be known and set up a summit between the Four Holy Beasts, Royal Knights, Three Archangels, and the Tamers. Before the meeting, the group are attacked by Spiral though the Deva, the Deva also attending the meeting, though the Tamers and the Deva are able to take them all out. The summit doesn't go well however, as the Archangels refuse to get involved in the Spiral problem and Examon pisses off the Holy Beasts by pointing out how badly their previous attempt at dealing with the Spiral had gone — as they and sent them to the Dark Area, which had cause them to learn how to transverse between the Dark Area, Digital World, and Human World. Before a fight escalates the Tamers are able to defuse the situation by calling for a break. They then decide to talk to each group individually, with Caturamon escorting the Protagonist, Rasenmon, Michi, and LovelyAngemon to the Archeangels. The group are ambushed by a group of Spiral on the way, though not having the time to deal with them they instead run passed them. Upon arrival they find the Archangels fighting Machinedramon and Gaiomon and join the fight to stop them, though Sara summons a group of Spiral which are able to stall the group long enough for Sara and Takumi to complete their goal, after which they flee through a portal. The Tamers are then able to convince the archangels to end the meeting amicably rather than have it devolve into fighting, and, due to the hard work of the others convincing the other groups to trust them as well the three groups agree to work together.
Some time after the summit; Rasenmon, HeavyLeomon, and Grizzlymon clear out Digital Points. Kazuma wonders if they can use the Digital Point to travel to the Digital World, since other Digimon and Spiral were able to do so, though Keito states he had already thought of this and that they weren't able to do so. Rasenmon decides to try something out, wondering if it was what the Spiral do to get to the Digital World, and to everyone's surpirse is able to open a portal to the Digital World. Rasenmon leads the group through it, only for it to instead lead to the Dark Area. As they transverse the Dark Area they find Seraphimon and Sandiramon attacking Dorumon and Takumi and jump in to protect them, however during the battle a group of Spiral arrive and, using their new skill hacked into them by Eiji Futami, paralyse everyone. As they are unable to move the Spiral attack them and the entire group de-digivolve back to their Rookie forms. Luckily for the group, Takumi and Dorumon return to the side of good and defeat the Spiral with their new form, Gaiomon Fierce Blade Mode. Rasenmon then opens up another portal, taking everyone back to the Human World. Having learned from Takumi that Eiji was evil, they decide to confront him. The group are able to find him and, finding him with Sara and Machinedramon – who are in the middle of fighting Cherubimon, LovelyAngemon, and Mitamamon – join the battle. The group fail to stop Eiji however as he is able to have Machinedramon and the Spiral stall them long enough to be able to run through the gateway to the Kernel. Unfortunately for Eiji, the gateway remained open due to Cherubimon using its remaining power with the Tamers being able to get Rasenmon, Jesmon, and their Tamers through the gateway as well before Cherubimon passes out.
Now back on the side of good, Rasenmon spars with Gaiomon Fierce Blade Mode in the Digital World as Rasenmon wanted to do so, having already sparred with all the other Megas. They battle for a long time, eventually ending with a draw after both run out of energy and dedigivolve at the same time.
When the Protagonist is convinced into downloading the new "Mephisgram" app, Herrismon and its partner try to come up with what type of picture they should take. As they ponder, they see Impmon about to kill a group of humans and stop it. Impmon then notices the smartphone, and, sensing Mephistomon from inside the app, jumps into the phone – the phone also sucking in Herissmon and its partner. Once inside, they are confronted by Mephistomon, the apps creator, who attacks them – not wanting a Tamer to stop its plan. Herissmon warp digivolves to Rasenmon and easily defeats Mephistomon, though it runs away saying it had stolen a Beelzemon's power and that it would use it when the time was right. As they search for it, they come across Impmon again and tell it that they had fought Mephistomon. As Impmon demands to know where it was, they are attacked by Gulfmon, the newly digivolved version of Mephistomon who had used the power of its app to digivolve. As Gulfmon attacks them, it becomes more and more powerful during the fight due to all the data constantly being uploaded to Mephisgram. Rasenmon fights and stalls Gulfmon, with Impmon leaving to search for its power, and after a long fought battle – Gulfmon wins. Before it can kill Rasenmon and its Tamer however, it is interrupted by Beelzemon and Gallantmon, with Gallantmon having found the last of Beelzemon's data and allowing it to have it back. The combined might of Rasenmon, a member of the Seven Deadly Digimon, and a member of the Royal Knights isn't enough to defeat Gulfmon however which forces Beelzemon and Gallantmon to digivolve to Beelzemon: Blast Mode and Gallantmon: Crimson Mode. The three of them are then able to kill Gulfmon.
- Gyro Smash: Dishes out a powerful punch whilst spinning the blades on its arm.
- Spiral Vanish: Shoots out and fuses all of the spiral-shaped spines covering its body to form a gigantic drill which it uses to impale the opponent. Spiral Vanish is its trump card where it unleashes all of the emotion energy it has stored together with its drill to deliver a crushingly powerful blow.
- Quellrise Blast (Qualialise Blast): Spins its blades at extremely high speed, creating tornadoes that strike the opponent.
Notes and references
- Digimon ReArise cast reveal trailer (May 9 2018)
 Digimon ReArise: Character profile - Herissmon
Introducing a Digimon that appears in #DigimonReArise!A Digimon that appeared to the Player on a certain occasion. It is an innocent being that is very curious, and yet there are many things it doesn't know. It faces opponents who don't have the word "Partner" in their hearts. #DigiRise #Digimon
#デジモンリアライズ の登場デジモンを紹介！ある事がきっかけで主人公(プレイヤー)の前に現れたデジモン。好奇心旺盛だが、知らないことが多い純粋無垢な存在。＂パートナー＂という言葉を胸に未知なる敵に共に立ち向かう。#デジライズ #デジモン
 Digimon ReArise: Character profile - Agumon
Introducing a Digimon that appears in #DigimonReArise!A Digimon that is slightly optimistic. It got along with Herissmon during a common struggle. #DigiRise #Digimon
#デジモンリアライズ の登場デジモンを紹介！少し能天気なところがあるデジモン。共闘したことがきっかけでエリスモンと仲良くなる。#デジライズ #デジモン
|Main Characters:||Protagonist | Takumi Hiiragi | Michi Shinjo | Keito Tamada | Mayu Kohinata | Mon | Kazuma Natsuyagi | Sara Shinkai|
|Digimon:||Herissmon | Dorumon | Salamon | Elecmon | Kudamon | Hackmon | Bearmon | Tapirmon|
|Antagonists:||Spiral | Eiji Futami|
|Other characters:||Agumon | Chihiro Tsukimori and Lopmon | Nozomi Tamada and Pumpkinmon | Royal Knights | Four Holy Beasts | Deva | Three Archangels | Other characters|
|See also:||Digimon | Real World | Digital Point | Profiles|