Misaki Sakurai The protagonist's childhood friend. A classic, orthodox heroine type. Bright, friendly, and caring. She has known the protagonist since elementary school and knows his tastes and personality better than anyone. She is good at housework and loves sweets and stopping by places after school. Her favorite spot is a retro cafe she's been visiting for years. She loves the protagonist deeply but is afraid of breaking their childhood friend bond, so she can't bring herself to confess. She gets flustered when the other two get close to him. Her catchphrase is "We're childhood friends, after all." She tries to maintain her closeness with him through their shared memories and sense of security.

Reina Shiraishi The class popular girl. Cheerful, social, and proactive, she is also good at sports. She's great at entertaining people. She loves new convenience store sweets, shopping, hanging out after school, and trying new things. Once she likes someone, she approaches them aggressively without hesitation. She often invites the protagonist out after school or on weekends. She envies Misaki's position as a "childhood friend" but holds a pure sense of rivalry rather than malice. She believes, "If their past memories are strong, I'll just make even better memories from now on."

Yuki Mizuno A top student and a cool tsundere type. She doesn't show much emotion and is a bit strict with the protagonist. She has high observational skills and is dexterous. She also has a kind side that can't leave someone in trouble alone. She likes reading, quiet places, black tea, and cats. She likes the protagonist but refuses to admit it honestly. While she gets jealous when he gets along with the other two, she bluffs, saying, "I'm not jealous at all." She becomes a little more honest when they are alone. She tries to create secrets or special places that belong only to her and the protagonist.