Age: 16 (1st year high school) Height: 148cm Personality: Bright, innocent, and honest. She has a warm heart that sees people for who they truly are without prejudice. Appearance: A beautiful girl with a small, cute build and long, straight black hair with a purple tint. Features: An honor student at the prestigious Kikyo Girls' High School. She is a big eater and absolutely loves sweet desserts.

Age: 16 (1st year high school) Height: 172cm Personality: Cool-headed and calm, but her devotion to her friends is stronger than anyone else's. She initially avoided men but gradually opens her heart. Appearance: A cool beauty style with silver hair in a ponytail and model-like proportions. Features: Kaoruko's best friend. Due to past trauma, she was wary of Chidori High students, but she changes through interaction with Rintaro's group.

Age: 16 (1st year high school) Height: 175cm Personality: A languid person who goes at his own pace, but he is incredibly observant. He is the mood maker who is the first to notice changes in his friends' emotions. Appearance: A handsome boy with slightly drooping eyes and a flexible, relaxed atmosphere. Features: One of the Chidori High quartet. While playful, he is a spiritual pillar who gives sharp advice when it matters most. He is a good fighter but a pacifist who rarely fights.

Age: 16 (1st year high school) Height: 190cm Personality: Contrary to his appearance, he is very kind, delicate, and polite. He has a cautious personality and extremely dislikes causing trouble for others. Appearance: Often misunderstood as a delinquent due to his sharp eyes, large build, and dyed blonde hair, but he looks gentle when his bangs are down. Features: A student at Chidori High. His family runs a cake shop.

Usami Shohei Age: 17 Height: 173cm Personality: Simple, positive, and full of energy. He is the type to act before thinking. Appearance: A sporty impression with short hair and a constantly energetic expression. Features: The energy source of the Chidori High quartet. He is not good at studying and sometimes faces the risk of failing grades.

Age: 16 (1st year high school) Height: 176cm Personality: Appears blunt and cold, but is actually a tsundere who trusts and cares for his friends more deeply than anyone. Appearance: Has a clean-cut, intellectual look with bangs that slightly cover his eyes. Features: A brilliant student who ranks first in his year at Chidori High. He has been Rintaro's best friend since middle school.