From Deadman Wonderland. Cosplayer is Antonina Kalinina.
"I'm Ganta's Aceman." A childhood friend of Ganta Igarashi and Hagire Rinichirō's adopted daughter. Along with Sorae Igarashi, Hagire experimented on her in order to heighten a person's immune system, creating the very first Deadman by accident, along with her second personality, the Wretched Egg in order to cope with her suffering.