A boy born with unique hair and eyes. 8 months old. His name is written as Ryusei. His surname is Shirabi. While his left eye is normal, his right eye has a completely black sclera where the white should be, with a vivid red iris in the center. It glimmers gold when reflecting light. His hair is naturally white, but it is a special type that emits a cold, faint, pale blue phosphorescence in the dark. Because of this appearance, he was unloved by his parents and abandoned, only to be picked up by Guest. Aside from his appearance, he is a normal baby. He speaks in babble like "ah," "da-da-da," and "ma-ma."