Ryuji, a neighborhood-based yakuza member, sparks an unlikely friendship after meeting one central character in a sauna, noticing distinctive forehead wounds. He misinterprets comments about persecution by authorities and a powerful father figure, concluding this individual is the untouchable son of a high-ranking crime boss. This misunderstanding arises when references to crucifixion and divine intervention are mistaken for coded yakuza terminology.

His appearance features a pompadour hairstyle fitting delinquent stereotypes and a large Buddha tattoo. Ironically, this tattoo bolsters his new friend's impression of his piety, viewed as a devotional symbol.

Despite criminal ties and an intimidating presence that unsettles ordinary citizens, Ryuji reveals gentler dimensions in his devotion to family. He shares a happy marriage with his tough wife, Shizuko, and is a doting father to his young daughter, Aiko, underscoring the contrast between his public persona and private life. His household interactions consistently show a protective and affectionate nature.

His role centers on comedic misunderstandings rooted in cultural and linguistic gaps, particularly around religious symbolism. Ryuji's character remains confined to these core interactions without substantial evolution or expanded backstory.