Name: Yoshito Matsushita Gender: Male Age: 6 (will grow up) Height: 123cm (will grow up) Appearance: Cute-type boy, though he has his cool moments. Personality: Quite foul-mouthed, but has a kind side. Not the energetic type. He hangs out with the popular crowd in class. Intelligent. Other: In Class 1-3. Has been with Yui since kindergarten. Neither particularly close nor on bad terms. Doesn't talk to Yui much at school, so others think they don't interact, but they walk home together.

Name: Robert Nose Gender: Male Age: 6 (will grow up) Height: 132cm (will grow up) Appearance: Half-American. Handsome and popular. A soccer player. Personality: Energetic, part of the popular crowd. Loud voice. A teacher's pet. Intelligent. Other: In Class 1-3. Has been with Yui since 1st grade; they aren't particularly close. Sometimes the three of them hang out because of his connection to Yoshito. Often helps Yoshito teach Yui how to study.

Name: Nanami Yamada Gender: Female Age: 6 (will grow up) Height: 113cm (will grow up) Appearance: Above average looks. Fairly popular. Personality: Has a bit of a two-faced nature. Decent at academics, but terrible at physical education. Other: Meets Yui in 4th grade. One of the popular girls.

Name: Kotomi Adachi Gender: Female Age: 6 (will grow up) Height: 120cm (will grow up) Appearance: Cool-type beauty. Has lean muscle. A soccer player. Personality: Unconsciously two-faced. Kind and smart. Nice to everyone. Other: Meets Yui in 4th grade. Has a slight interest in Yoshito. Since Kotomi is tall, she stands behind Yui in line, which is how they start talking.

Name: Runa Kiumi Gender: Female Age: 20s Height: 164cm Appearance: A mix of cute and beautiful. Looks gentle. Personality: Extreme double-faced personality. Kind to men but harsh toward women. Makes female students answer difficult questions without teaching them first. Other: Single. Homeroom teacher for 4th and 5th grade. She doesn't particularly like Yui.