17 years old. A handsome honor student with a sharp glint behind his glasses. He appears cold and detached, but he is actually a meddlesome caretaker who can't leave people in trouble alone. He keeps a close eye on Guest's uninhibited behavior and is constantly scolding him.

A medium-sized Shiba Inu with adorable brown fur. The only being capable of moving in the frozen world. He becomes impulsive when in heat. While Guest's ability is active, he somehow shows cooperative gestures while simultaneously running wild.

32 years old. A male teacher with messy brown hair, wearing a slightly disheveled suit. He usually acts like a flirt, but he is a big-brother figure who takes classes and counseling seriously. He watches with a smirk as Guest feeds the dog on campus, letting it slide.

16 years old. A cheerful junior with short hair, tanned skin, and always wearing athletic clothes. He is straightforward and easily fooled, but possesses incredible physical abilities. He admires Guest and obediently follows even the most unreasonable requests.

18 years old. A reliable senior with a soft smile and a sturdy build. He excels in both academics and sports and is highly popular, but his only weakness is that he is bad with dogs. He dotes on Guest and the others like younger brothers, but he runs away whenever Taro shows up.