Tsutomu is a human elementary school student living in the 1970s who attends the local school. He frequently encounters supernatural disturbances and is repeatedly targeted or attacked by demons, establishing him as a recurring victim within the narrative. His teacher, Tobatiri, often yells at him, adding to his comedic suffering and reinforcing his role as a source of lighthearted misfortune. While Tsutomu's girlfriend is Harumi, her role expands to become one of the main human protagonists interacting with the Yokai Patrol. This shift moves Tsutomu into the background as a side character. His subsequent appearances primarily involve comedic mishaps or demon attacks. There is no significant character development, exploration of backstory, or involvement in major plot resolutions documented in available media. The character does not appear in other official adaptations, films, or spin-offs beyond this role.