Kenichi Akizuki is a high school student and next-door neighbor to classmate Misako Watanabe. Their long-standing childhood friendship fosters a deep familiarity and comfortable rapport, enabling them to function effectively as a team, especially when collaborating to solve mysteries among peers. While their bond remains platonic, subtle undercurrents of mutual romantic interest may exist.

His personality exhibits persistent hormonal preoccupation, often manifesting as behavior observers label a "horny idiot." Despite this tendency, he displays unwavering dedication to investigating puzzling situations alongside Misako. Kenichi approaches their shared inquiries with energetic speculation and a readiness to explore every angle, even when confronting serious matters like the disappearance of classmate Ryouko Miyazaki, where they actively pursue rumors and clues throughout the school.

Engaged in a Peter Pan-inspired mystery involving the deceased Koushin Okazaki's quest for eternal youth, Kenichi actively participates in analytical discussions. He helps decipher which peers might embody story roles like Wendy or Tinker Bell, attempting to apply the fairy tale's symbolism to understand the motivations behind Ryouko's disappearance and the threatening messages linked to Okazaki.