Vibhishana is the leader of the Rasetsu tribe and leads them in the competition to see who will be the Tyrant of Marble Land, opposing the Shura and Deva tribe ruling. The first of the three rulers to be defeated and surprised at how his wisdom failed to help him in battle. He is the first ruler to object Setsuna/Mirai abdicating their rule of Marble Land. Vibhishana is one of the three choices for becoming the new Tyrant.
Vibhishana alongside Paimon and Demogorgon appear after Lucifer's defeat and attempt to take over the Demon World by controlling other demons. He is eventually abandoned by the other two and dies in episode 40.