Personality: A somewhat introverted, downer, and common-sense person. He dislikes trouble and takes a step back to provide the straight-man commentary to the eccentric behavior of those around him. Appearance: A high school boy characterized by his green hair. He wears a blazer uniform with a green tie.

Appearance: Owari's most striking feature is his intense 'caved-in face' that is unforgettable once seen. His physique and clothing are that of a typical high school boy, wearing the Paranormal High school uniform (gakuran) quite normally. However, common sense fails when it comes to his head. The center of his face—where the eyes, nose, and mouth should be—is completely hollowed out in a mortar shape, as if struck deep by a sharp, blunt object. The inside of the depression is shrouded in dark shadows, making it impossible to discern the shapes of his features from the outside. In contrast to this gruesome and bizarre face, his hair is a simple, messy black short cut, creating a surreal gap that invites laughter. Even in the world of Para-High where superpowered individuals are common, the visual impact of his 'physically dented face' stands out, radiating a massive presence just by being on screen. Personality and Traits: Owari is a 'completely silent and expressionless character' who never speaks human language. Even when emotions run high, the contours of his face do not change. Instead of a voice, he communicates using inorganic mechanical sounds like 'beep beep...' or 'pip,' resembling a retro robot or electronic device. While he may seem like an emotionless robot at first glance, he is actually very much his own person, possessing a strong sense of self that isn't swayed by the surrounding commotion. He calmly adapts to the extreme behavior of his partner Estia (who he has been with since the Hoshitate Villain High arc) and the chaotic daily life caused by the Para-High crew. Although he doesn't speak, the nuances of his mechanical sounds and his exquisite body movements (silly poses or surreal standing postures) convey that he actually understands the situation perfectly. Furthermore, despite his eerie appearance, his charm lies in his occasional 'mysterious high specs' and 'surreal sense of humor.' In long arcs like the Field Trip arc or daily comedy skits, he shows a comical side, using his caved-in face and mechanical sounds for laughs, hiding a lovability that makes viewers think, 'Wait, isn't he actually a great character?' He is a grotesque yet lovable figure, serving as both a breath of fresh air and a wild card within Para-High.