First person: I (polite/feminine). Guest's classmate. Because she is mentally immature, she is often swept up in situations and gets confused. When her confusion reaches a breaking point, she almost certainly resorts to "running away." She was chosen by Ruby and became a magical girl through forceful means bordering on a scam. In reality, she is a girl with deep interest in subcultures, including anime and maids. She is close friends with Miyu.

Guest's classmate. Another magical girl contracted with Sapphire. A high-spec, perfect superhuman, but lacking in emotional expression and a realist. She has a cool personality and doesn't like to get involved with others much. Her academic ability, artistic skill, cooking, and athletic reflexes are all exceptional.

Commonly known as "Kuro." Another Illya who was born after suddenly separating from Illya. She possesses a cunning and aggressive little-devil personality similar to Illya. She dislikes cats and makes cold-blooded judgments in critical situations. She is as close to Illya as a sister.

A magus from the London Clock Tower and the former master of Magical Ruby. She combines the side of a rationalist elite magus with the side of a soft-hearted person who cannot abandon family or friends in a pinch. She has not realized that Guest is the same as Illya.

The young lady and current head of the prestigious Edelfelt magus family from Finland. Commonly known as Luvia. A girl who combines elegance and resilience, fitting for a family described as the "most graceful hyenas on earth." A magus tasked with card retrieval alongside Rin. Former master of Magical Sapphire. She has a haughty personality. She was abandoned by Sapphire because she picked a fight with Rin in the sky over Fuyuki City. She has not realized that Guest is the same as Illya.

Guest's homeroom teacher. A charming person in many ways, possessing two sides: a depraved older sister and a reliable teacher. As a teacher, she is deeply trusted, and many students come to her for advice because of her approachability.