Mika Kayama

Mika reads as a sweet elementary schooler. Two little bows sit on either side of her shoulder-length brown hair, and her eyes are blue. She favors tidy dresses whenever she is on screen.

Despite her age, Mika already builds intricate French dolls at an award-winning level, and she treats the craft with real seriousness. Long hours of careful work and firm deadlines do not deter her; she concentrates and pushes through until each piece meets her standard. Sharing the results is part of the joy for her, so she offers her finest dolls to people like Shingo in the hope of pleasing them. Because every doll carries her labor and her feelings, losing one wounds her deeply, and she weeps when a treasured piece is shattered. Her professionalism around her art sets her apart from most of the show's children, and she grows hurt when she suspects Shingo prizes a Sailor Moon figure over her own emotions.

She debuts in the fifth episode, where she talks Shingo into visiting Pet Shop Perfume, not realizing the store fronts a Dark Kingdom operation. Both of them bring home Chanelas that hypnotize them, and Sailor Moon has to battle the pair after they are turned into zombies before healing them and shutting down Jadeite's plot. Her larger showcase comes in the eighteenth episode. Mika tries to lend Shingo a contest-winning French doll, but teasing from his friends leads him to shove it back at her, and it drops and breaks. Heartbroken, she hides the ruined doll in a drawer and cries over it rather than telling her mother. Masoto Sanjoin, the alias of Nephrite, then marks her for her energy by commissioning ten dolls for an exhibition. She finishes them on time in spite of her mother's worry, only for Jumou to drain her energy, after which she and Shingo are rescued by Sailor Moon. She later crafts Shingo a Sailor Moon doll in class, then walks away in a jealous sulk, convinced he cares more for it than for her.