The Principal is the head of Yamabuki High School, the art school that the main characters attend, and he appears as a recurring supporting character. He is a short, balding man who is depicted as elderly, but he possesses an unusual level of physical fitness for his age and his small stature. In the story, he serves as the school's authority figure, watching over the institution and its students while working to maintain order among the staff.

His personality comes across as that of a responsible administrator who takes his position seriously, and he is most often shown reacting with exasperation to the disruptive behavior of the faculty, particularly the teacher Yoshinoya, whose extravagant antics he regularly scolds. His main motivation is tied to his duty: he works to keep the school running smoothly and to curb the excesses of his more chaotic employees. His key relationship is therefore with Yoshinoya, who frequently serves as his comic foil, and he also maintains a more distant, supervisory connection to the student body, including Yuno and her friends.

As a minor recurring character, the Principal does not undergo significant development or a personal story arc; his role remains stable throughout the series, providing a grounding and comedic counterbalance to the energetic and whimsical tone of the show. His most notable trait is his surprising fitness, which contrasts sharply with his elderly appearance and short height.