Haruhito Yano, 27, operates within Shigeru Kuroda's yakuza syndicate. He conducts criminal activities like extortion, kidnapping, and interrogation alongside his partner and bodyguard, Togo Sekiguchi. Yano speaks almost entirely in rap verses, frequently using hand gestures, a trait that vanishes only when he becomes flustered or enraged.

He maintains a fierce rivalry with fellow yakuza Dobu (Kyouhei Mizoguchi), viewing him as both a junior and a bitter enemy. Their conflict stems from a shared past where Dobu once mentored Yano; this history deteriorated into intense hostility. Songs from the EP "2019", inspired by Yano, explore this bond and fallout through tracks like "Bro. DOBU" and "Bro. DOBU SKIT", depicting their past camaraderie and Yano's lingering resentment over Dobu's betrayal. This animosity fuels Yano's efforts to sabotage Dobu's operations.

Yano masterminded a scheme to steal a billion-yen lottery ticket from Shun Imai, employing a honey trap using Shiho Ichimura of the idol group Mystery Kiss. When Odokawa, Dobu, and the Daimon brothers disrupt the plan, Yano shifts from manipulation to aggression. He kidnaps Odokawa's friend Eiji Kakihana for ransom and confronts Dobu directly during the money exchange, demonstrating his capacity for violence when desperate.

Yano's porcupine appearance is a manifestation of taxi driver Hiroshi Odokawa's visual agnosia, stemming from childhood trauma; Yano is human, though this perception doesn't alter his criminal conduct or personality. Official records list his age as 27, though a series news report erroneously states 28.

Across all media, Yano remains a consistent figure in the syndicate hierarchy, leveraging cunning and ruthlessness. His rap-based dialogue and partnership with Sekiguchi persist as defining features, with no depicted redemption or moral shift. His involvement in central criminal plots underscores his role as a persistent antagonist in events surrounding Sakura Wadagaki's disappearance and Mystery Kiss.