Based strictly on the provided description, Kouichirou Endou is a junior high school classmate of Tasuke Shichiri. He presents as a small, boyish young man distinguished by his glasses, dark blonde hair, and petrol-colored eyes. He and his friend Takashi Nomura form a duo frequently referred to as "Those Two Guys." Both are aware of the supernatural spirit Shaorin and her connection to Tasuke. Kouichirou develops a persistent romantic interest in another spirit, Keikounitten Ruuan, drawn to her maturity and presence, though his feelings remain unrequited. His personality aligns with the "Cute Shotaro Boy" archetype, often displaying energetic or "Keet"-like behavior. He frequently becomes entangled in comedic or unfortunate situations, primarily due to Ruuan's actions or the supernatural chaos surrounding Tasuke, establishing him as the series' primary "Butt Monkey." Across all documented media, his established traits, dynamics, and comedic role remain consistent without significant character development, expanded background, or altered narrative function.