ONA
Description
The character name in the source material is Abigail, also known as Avigail in some references. He is a major figure in the Bastard!! manga, serving as the leader of the Four Divine Kings and a primary antagonist in the story's early arcs.

Abigail's origins trace back to the end of the Old World, where he was a scientist and one of the Ten Wise Men of Europa. Following the destruction of that era, he and his colleagues transformed into Dark Elves to extend their lifespans. Centuries later, he left the group to become a human cleric, traveling the world as the Dark Prophet of the Underworld and mastering Earth, Undeath, and Dark Magic. He eventually joined the Four Divine Kings under the powerful sorcerer Dark Schneider, sharing their ambition for world domination.

Personality-wise, Abigail exhibits a notable duality. While under the control of the god of destruction Anthrasax, he becomes a sadistic and megalomaniacal figure. However, once freed from this influence, his demeanor shifts dramatically to become calm and stoic, though he still retains an over-the-top flair in his actions. As the leader of the Four Divine Kings, his primary motivation becomes the acquisition of the four seals that bind Anthrasax, with the goal of reviving the god and using its power to create a sorcerers' utopia.

His role in the story is pivotal. He begins by besieging the Kingdom of Judas and breaking the first seal, an act that leads to his possession by Anthrasax's spirit. In this state, he manipulates his allies, uses the Blue Nail of the Accused spell on Arshes Nei, and unleashes a zombie army and powerful artifacts against the kingdom of Metallicana. After Dark Schneider destroys his body, the essence of Anthrasax within him is also destroyed. Abigail's liberated soul then rebuilds his form, and he hides within a mechanical exo-suit, adopting the silent alias of the samurai Angus Yarn to infiltrate the main group. He later reveals himself to restore a shrunken Dark Schneider to his original size using the Magical Great Metal Hammer and, convinced by the fallen archangel Lucifer, removes the limiters on a Spirit Energy Reactor to generate enough energy to resurrect Dark Schneider.

Abigail is an exceptionally powerful sorcerer with a wide array of black magic spells. These include Accused, which places a victim under a geas-like compulsion, Thor, a powerful magic beam, and Heretic, which summons vine tentacles from the earth. He also possesses a tentacle cloak made of living creatures animated by magic, which can act as a lightning rod, anchor him in place, or immobilize opponents. His ultimate technique involves combining with the Three Demonic Treasures to transform into a giant construct called Ultra Omega Abigail. In this form, he gains incredible destructive power, including beam attacks like the Abigail Buster, Abigail Beam, and the chest-launched Abigail Collider. The armor is covered in Anti Magic Talismans, granting it resistance to nearly all forms of weapons and magic. However, this form has a critical weakness: the energy collecting membrane exposed in its chest cavity when firing its most powerful attack is not protected by its magical defenses.