Also known as: 黒戦人, くろばとら
Ushiromiya Battler's Dark Persona, he represents theories that place Battler as the culprit. Mainly depicted as a cold-blooded and borderline sadist murderer, along with his parents Rudolf and Kyrie. He later became a playable character in the Umineko fighting game Ougon Musou Kyoku.
Dressed mainly in black and purple colours, with red eyes.