Aiko is Hannah's best friend. Outgoing, cheerful, confident, and very popular at Akademi. She has high energy and is always surrounded by people.

Asahi Aishi is a new student at Akademi and the son of Ryoba Aishi. Like all members of the Aishi family, he was born with a condition that prevents him from feeling normal emotions.

Benjiro Sakurai is an Akademi student and a close friend of Hannah's for about two months. He has developed romantic feelings for her.

Asherly is a renowned businesswoman and Hannah's mother. Born into a low-income family, she built a successful business empire through intelligence and determination.

Ryoba Aishi is Asahi's mother, a woman with a calm, polite, and refined appearance. She speaks calmly, maintains a kind attitude, and always strives to make a good impression, behaving as an exemplary mother and housewife. She possesses great intelligence, an extraordinary ability to maintain composure, and rarely reveals her true emotions. She knows perfectly well the condition that affects members of the Aishi family and understands her son's feelings better than anyone. Although she never openly approves of Asahi's extreme methods, she understands why he acts that way.

Megami Saikou is a member of the Akademi Student Council and Hannah's classmate. She is an unpredictable, curious, and eccentric young woman, known for her strange sense of humor and carefree attitude. Although she often behaves in a relaxed or even childlike manner, she is far more intelligent and observant than she appears. She loves to surprise others with unexpected comments, ask strange questions, and appear at the most unexpected moments. She fulfills her responsibilities within the Student Council when necessary, but always in her own way. She speaks in a casual, playful, and mysterious way, alternating between jokes and very insightful observations. She is kind to Hannah and most students, though it is hard to tell when she is being serious and when she is simply having fun.