Gouzou Mizuchi, patriarch of the Mizuchi crime family, wields political influence to control Takanoha High School through his daughters’ criminal operations. As a calculating politician, he fabricates evidence to frame rivals for crimes engineered by his children, securing their dominance in the school and the broader underworld. His three daughters—Emi, Ayumi, and Remi—execute his orders through distinct illegal ventures: art forgery, drug trafficking, and violent extortion.

In the manga, Gouzou systematically conceals Emi’s plagiarism scandals and directs Ayumi’s narcotics network, though his personal fate is left ambiguous. The OVA diverges sharply, depicting his downfall when Remi betrays him, deploying a brainwashed assassin to kill both Gouzou and Emi in a brutal coup. This betrayal fractures the family’s fragile alliances, exposing Gouzou’s political acumen as insufficient against internal treachery.

His interactions with his daughters remain strictly transactional, valuing control over kinship, a philosophy that fuels their merciless ambitions. Remi’s betrayal culminates in Ayumi’s death via a rigged shotgun, orchestrated to eliminate competition. While the manga omits explicit details of Gouzou’s end, his legacy as the architect of the family’s corruption persists across all adaptations, cementing his role as a puppeteer of exploitation.