Leo Kakinoki serves as a primary member confronting supernatural threats in his town, driven by an intense fascination with paranormal phenomena. He self-identifies as a specialist and respected researcher in ghosts and supernatural entities, actively investigating rumors and legends while documenting occurrences with his camera. His logical explanations for these phenomena often lead to incorrect conclusions, inadvertently escalating dangers for the group. He maintains a close friendship with Hajime Aoyama and operates within the core group alongside Satsuki Miyanoshita, her younger brother Keiichirou, and Momoko Koigakubo. An underlying arrogance surfaces when his expertise is challenged, exemplified by his relentless pursuit to prove the existence of the ghostly Yomi-net webpage or diva-like behavior after leading a school arts festival. Despite aspiring to bravery, he frequently exhibits profound cowardice during genuine supernatural encounters. Within the group dynamic, Leo provides initial background on spirits and hauntings through online research or local rumors. His flawed logical approach remains one method the group employs to understand threats. The English adaptation incorporates specific cultural elements, portraying him as part of a Jewish family to contextualize dialogue and interactions. Though fear or pride occasionally hinders him, his contributions remain part of the collective effort to resolve supernatural incidents.