Ossan attends Minakami High School as both a student and Hero Club member, steadfastly embracing chuunibyou delusions of being a powerful wizard. His eccentric appearance features unkempt black hair, a goatee, and an ever-present long black robe embellished with shiny accessories, complemented by a carried wizard's staff to solidify his imagined identity. He peppers speech with frequent English phrases and projects an aloof, peculiar demeanor, ensuring a standout presence during group interactions.

He readily boasts about his self-proclaimed magical abilities and judges those dismissing them with swift harshness. Yet beneath these quirks, Ossan exhibits fierce loyalty and protectiveness toward fellow club members, devising elaborate spells or illusions to defend or support them. He eagerly teaches magic concepts but visibly chafes when others treat his craft lightly, cementing his role as a dedicated—if unconventional—participant in club endeavors.

Within the Hero Club, Ossan collaborates with peers sharing grandiose delusions, his self-styled wizardry dynamically enhancing group activities. He approaches challenges through systematic analysis and logical reasoning, extending this precision to organizational tasks like managing club finances and honoring commitments punctually. Though rigid adherence to self-made rules can seem stern, his unwavering reliability consistently underscores a deeper concern for others.