Berial was a member of Demon Card. He was a member of the Oracion Six and an archduke in the Demon World. A four-eyed demonic bat named Boi Boi often sat on his shoulder. He was the one who proposed to the Great Demon Lord Megido of the Lava and his peers for them to ally with Demon Card, as part of the organization's ambitious Project: Dark Rendezvous. He uses the Six Star Dark Bring G-Earth, which allows him to manipulate the ground. He appears again after The Blue Guardians are defeated and sends an army of monsters to kill Haru and his friends after Haru had retrieved the final RAVE. Haru kills him with a single hit. This is surprising because the author's notes define him as the strongest.