Kirika Yuumura is an assassin who worked with Mireille Bouquet under the codename Noir. Much about her past is mysterious, even to her; she experienced severe retrograde amnesia almost immediately prior to meeting Mireille, and since then has recovered only fragmentary memories. Despite her young age, memory loss, and a certain naiveté, Kirika possessed the skills of a superbly-trained killer. Her preferred weapon was a Beretta M1934 pistol, although she was also an expert at killing people with whatever was at hand. Kirika has an enigmatic, glacial, troubled, solitary, grim, ruthless, stoic, brooding, and extremely creative personality.

A short mute from that hangs around Roman Torchwick. loves ice cream, playing with her opponents and stealing. Is currently looking for revenge against Ruby Rose for Roman's death.