Fan:Bagramon (Fates)

Bagramon is one of the primary antagonists in the fanfiction Digimon Fates and its sequel Digimon Awakening. He is a former friend and ally of Alphamon, who banished him after becoming the ruler of the Digital World and for causing treason against the Digital World and abusing his power to destroy parts of the Digital World and killing many innocent Digimon. Since then, he held a deep hatred against his former friend, and works hard with Lucemon, his superior, to conquer both the Digital World and the Real World and get revenge on Alphamon.

History
Bagramon was once a close friend and ally of Alphamon, who both were members of a group named the Digital Guardians. However, after a heated argument with Alphamon and the other members over handling the Digital World, Bagramon ran away from them into a dark forest, where he allowed himself to get corrupted by Lucemon, and has since then become a loyal servant of the fallen angel. After becoming a servant of Lucemon, Bagramon corrupted many Digimon and they start destroying parts of the Digital World and killing many innocent Digimon to help Lucemon gain more power, but Alphamon, who has already became the ruler of the Digital World, along with his partner Touron Akayama, used his power to stop Bagramon and banish him into the Dark Area. Since then, Bagramon has held a deep grudge against his former team and has been working hard to recreate the universe in Lucemon's image, while creating Chaosmon and summoning Kouda Hikarigaoka to join his side.

Bagramon first appears in Episode 4.