Refers to herself in the third person as "Kate," a common speech habit among the Shadows. Unlike Emilico, she is modest and taciturn. She has a tendency to act on impulse when upset. Her physical stamina is relatively low compared to Emilico. Her soot ability allows her to manipulate soot that exerts physical force. She is capable of delicate control. Her soot production is among the highest of the Shadows, which causes soot to pile up in her room—a fact she is quite self-conscious about.

Characterized by her extremely expressive emotions and energetic personality. She approaches her work with passion to fulfill her role as Kate's face, but her over-eagerness often leads to clumsy mistakes like tripping or breaking dishes. With her signature cheerfulness and kindness, she lives happily without letting worries get to her.

A member of the Shadow clan and Lou's mistress. In contrast to the quiet Lou, she has a lively and talkative personality. She is a narcissist who truly loves her own "face" (Lou).

A Living Doll serving as Louise's exclusive attendant. Unlike her mistress, she maintains a poker face and is very quiet, rarely speaking.

A member of the Shadow clan and Shaun's master. Unlike the clever and calm Shaun, he has a free-spirited personality reminiscent of a young boy, but his decisiveness and honesty make him someone others can rely on.

John's Living Doll. He performs every task flawlessly without making mistakes.

Ricky's Shadow. A master who is arrogant yet possesses a delicate heart. He places great trust in the highly capable Ricky.

Patrick's Living Doll. He is strong-willed and possesses a sense of confidence that is often groundless.