Arios

Arios is the reborn form of Leviath Ragna Alviss, the displaced heir to a cosmos ruled by an emperor. Leviath invades the Cosmos of the Divine Bird to gather enough energy to reclaim his throne after his uncle usurps it and drives his lover Elis to suicide. After Leviath is defeated, he is reborn in the Cosmos of the Holy Beast as Arios.