Guest's twin brother! John's Living Doll. He is calm, quick-witted, and starts off as the voice of reason, growing as a character over time. He plays the straight man to John's reckless behavior. He always uses formal honorifics and polite speech toward Shadows. Among fellow Living Dolls, he speaks casually and kindly. He's the type to never back down from a fight. Living Dolls have all their human memories erased before being brought to Shadows House. He has poor eyesight, but rarely wears glasses so he can better resemble Master John's face.

Shaun's master. A Shadow with a bright and straightforward personality. He has a strong sense of justice and cares deeply for his comrades. He is the type to act before he thinks.