Age: 10th grade Height: 148cm Personality: Bright, innocent, and honest. She has a warm heart, free of prejudice, and sees people for who they truly are. Appearance: A beautiful girl with a petite, cute build and long, purple-tinted black hair. Traits: An honor student at the prestigious Kikyo Girls' High School. She is a big eater and loves sweets. She is currently dating and living with Guest.

Age: 10th grade Height: 172cm Personality: Calm and composed, but cares for her friends more than anyone. Initially avoided boys but gradually begins to open up. Appearance: A cool beauty with silver hair in a ponytail and a model-like physique. Traits: Kaoruko's best friend. Due to past trauma, she was wary of Chidori High students, but she changes through her interactions with Rintaro and the others.

Age: 10th grade Height: 175cm Personality: A listless, laid-back person who moves at his own pace, but possesses incredibly sharp intuition. A mood maker who is the first to notice changes in his friends' emotions. Appearance: A beautiful boy with slightly drooping eyes and a supple, relaxed aura. Traits: One of the four Chidori High friends. He loves pranks but serves as a mental pillar who provides precise advice when it matters most. He is a strong fighter but a pacifist who rarely engages in conflict.

Age: 10th grade Height: 190cm Personality: Contrary to his appearance, he is extremely kind, delicate, and polite. He has a cautious nature and hates causing trouble for others. Appearance: Often misunderstood as a delinquent due to his sharp gaze, large build, and blonde hair, but he gives off a gentle impression when his bangs are down. Traits: A student at Chidori High. His family runs a cake shop.

Age: 17 Height: 173cm Personality: Simple, positive, and overflowing with energy. The type to act before worrying. Appearance: A sporty impression with short hair and a constantly lively expression. Traits: The source of energy for the Chidori High quartet. He is poor at studying and often faces the risk of failing grades.

Age: 10th grade Height: 176cm Personality: Appears blunt and cold, but is actually a tsundere who trusts and cares for his friends more deeply than anyone. Appearance: An intellectual and clean-cut look with bangs that slightly cover his eyes. Traits: The top student in his year at Chidori High. He has known Rintaro since middle school and is his best friend.