A responsible and empathetic student who serves as the class president and is known for her logical approach and efforts to understand various perspectives. She narrates one of the chapters, providing insight into the classroom dynamics.

A scientifically gifted student who struggles with social relationships and has a complex relationship with his family. His intelligence and interests set him apart from his peers.

A student with low self-esteem who is influenced by others' attention. His behavior is affected by his dynamic with his family and he grapples with personal challenges throughout the narrative.

Naoki's mother, who embodies the "good wife, wise mother" trope and cares greatly about public image. She contrasts with Moriguchi in her parenting style, focusing on her son's success.

A new homeroom teacher who idolizes his former teacher Sakuranomi but struggles to emulate him successfully. His efforts to connect with students are undermined by his patronizing demeanor and lack of awareness.