Imotaro Gorira, nicknamed Goriraimo, starts as the primary school bully and Hiroshi's rival for Kyoko Yoshizawa's affection. His early behavior features relentless bullying of fellow students and recurring physical clashes with Hiroshi, embodying the gritty realities of suburban Tokyo youth.

His family's fish shop roots him in a working-class setting. Despite his aggression, he displays unexpected tenderness through a distinct fondness for cats. Gradually, his hostile dynamic with Hiroshi shifts toward camaraderie, leading him to collaborate in pranks and humorous escapades while curbing his former bullying habits.

During later story arcs, including the Solmac advertisement series, he assumes control of the family fish business. This progression marks his maturation into adult responsibilities, seamlessly aligning with his established origins.