Kosuke Kisakata/Partners

Tentomon


When Kosuke Kisakata was a teenager, he was partnered to a Tentomon. More than a decade later, as the leader of the Sons of Chaos, he is partnered to with Tentomon's whereabouts not being stated.

Whilst working on Mindlink tests for Tomonori Ryusenji; Kosuke, Saya Ryusenji, and Shuu Yulin were given partner Digimon. Kosuke's was able to turn his life around since he had to make sure he was able to properly look after Tentomon.

All three of them would go through many Mindlink tests though thus far had only explored their Digimon Docks. To be able to explore further than that, and reach the Digital World, they would need better computers. They would also need to learn how to control their partners, since if they lost control they would go passed the Mindlink limit and be unable to return to their bodies. Kosuke was in charge of the development of the Digimon tools and would send Digimon out to the Digital World to explore. Around 80% of the Digimon would return alive, giving them lots of useful information. Tomonori muses that it would be impossible for such tests to be 100% successful, comparing it to space mission in the past — this making the students uncomfortable since he brought up instances of astronauts failing to come back especially since they would soon be joining the Digimon on their travels via Mindlinking. They would refer to said upcoming Mindlinking project as the Tartarus program.

Some time later, and now ready to begin the Tartarus program Kosuke, Yulin, and Saya Mindlink to their partners and have them board the Tartarus probe, a digital observation vessel. The Digimon search the Digital World on their own virtual vessels with their partners controlling the vessels using Kosuke Kisakata tools. Due to the weak technology being used, the groups visibility was low but despite this they followed the path set for them and continued on their journey. As they explored, they were attacked with Kosuke and Yulin having no clue what had attacked them. Yulin and Kosuke figure had been the attack target, and were unable to do anything as Saya's unit vanished without a trace. Kosuke blamed himself, as he had been the one to push for her to be a one woman rescue team, and regretted it wishing he had been doing it instead so that she would've returned safe in place of him. Tomonori forces Kosuke and Yulin to retreat as he considered it far too dangerous to have them try and rescue his daughter. The Tartarus probe was damaged and and Tentomon were injured and as such he had them withdraw as the chance of all three of them falling into DMIA was too high.