Reo Kakinoki, also called Leo Kakinoki, stands at the center of a group of children facing supernatural threats. Born in 1990, he has tan skin, light reddish-brown hair, large lips, and light brown eyes behind rectangular glasses. His signature outfit consists of a light yellow hoodie with light gray sleeves displaying an owl decal and "2001," cerulean blue patches on the front pockets, light blue-gray pants, white sneakers, and a dark periwinkle baseball cap featuring the same owl. He is Hajime Aoyama's best friend and shares a close bond with Satsuki Miyanoshita. Introduced as a nerd, his personality unfolds with greater depth. Reo declares himself an expert on ghosts and supernatural phenomena, diligently scouring the internet for legends and rumors to provide initial context on encountered spirits. While he applies logical reasoning to these events, his deductions frequently miss the mark. He skillfully uses a camera to document the group's paranormal experiences. An undercurrent of arrogance and pride surfaces in his character. This is evident when he obsessively tries to convince skeptical friends of the ghostly webpage Yomi-net's existence and when he adopts diva-like behavior after assuming leadership for a school Fine Arts festival. Though he strives to emulate Hajime's bravery, he often displays cowardice. His attempts to validate supernatural clues typically backfire, causing the phenomena to target him. The ADV English dub portrays his family as Jewish, adding cultural layers. Across official media, he participates alongside the core group in exorcising spirits, contributing his knowledge of paranormal lore despite frequent misinterpretations. His journey includes joining Sora's team to battle monsters sharing traits with Ohma. Specific episodes highlight his narrative roles: during a cursed school arts festival involving the ghost Kutabe, his position as an understudy leads to a spectral confrontation; his fixation on proving Yomi-net drives the conflict of another episode.