Character who appears in Under Night In-Birth. He is an enigma, following along with his sister, Tsukuyomi, as they wander through the Hollow Night. He has no other motive other than to follow his sister's orders, usually involving him sinking the claws of his EXS, Chelicerata, into unwary victims. It is revealed that he knew Tsukuyomi was in fact, not his real sister. However, he is still willing to help her find what she's searching for. Fans often liken his appearance to Narukami Yu of Persona fame.
