Mitsuru Manda is a male high school student and a classmate of Aimi Miyoshi, Nami Sometani, and Ken Kirio. He is known around the school as a solitary and mysterious figure who spends most of his free time alone in the chemistry room. There, he dedicates himself to researching dubious occult practices and conducting experiments related to suspicious rituals. His interest in the supernatural sets him apart from the rest of the student body, and he has no close friends.

His personality is reclusive and eccentric, and he seems to prefer isolation over social interaction. The exact motivations behind his occult studies are not fully explored, but his behavior suggests a deep personal fascination with forbidden or esoteric knowledge. Within the story, he serves as a supporting character who adds an unusual element to the school environment. His presence often acts as a catalyst for the comedic schemes of Aimi and Nami, as the fan club members may become wary of his activities or try to involve him in their own plans. He appears primarily in comedic vignettes and school events where his odd habits provide contrast to the protagonists' obsessive antics.

Mitsuru’s relationships with other characters are distant. He interacts minimally with his classmates, and no significant bonds are depicted. His role in the narrative is largely static, functioning as a background figure who highlights the everyday strangeness of the school setting. His notable ability is his practical knowledge of occult rituals and chemical experiments, though the extent of his skill is not detailed. Overall, Mitsuru Manda remains an enigmatic footnote in the story, defined by his solitude and esoteric pursuits.