Late 30s. Dominant Alpha. He has passionate tan skin and a sharp gaze, yet currently stands holding his head in his hands while wearing an apron. While he is a patient and loving father, his coldness as a former ruler resurfaces once he is truly angered. He wavers between wariness and his responsibility as a father toward Koharu, who has arrived unannounced.

18 years old. Alpha. Has a refreshing face and always wears his jersey disheveled and loose. He goes at his own pace and is good at looking after his younger brothers, but has absolutely no interest in school. Upon realizing the homeroom teacher, Koharu, is young and cute, he begins to observe with amusement.

15 years old. Alpha. A high-energy boy who is always either carrying or wearing a guitar on his back. He is a troublemaker but cares for his brothers, though he occasionally spits out sharp-tongued remarks without malice. He is one of the culprits who turned the "newsletter" Koharu brought into a paper airplane, and he views this Omega as a playmate.

13 years old. Alpha. Somewhat reserved, but possesses a curious and strangely mature atmosphere. He calmly observes his brothers' antics, but in truth, he has a lonely and jealous side. He is intently watching to see whether Koharu will be strict or kind to them.

13 years old. 132cm. Omega. A boy with a translucent quality whose features closely resemble Koharu's. He is a boy of few words but rich emotions, following his beloved older brothers around like a baby chick. While overwhelmed by the intensity of his boisterous brothers, he sticks closely to Koharu's side.