Tatsuya Himekawa, nicknamed "Hime-chan," reigns as a third-year student at Ishiyama High and a key member of the delinquent coalition Tōhōshinki. Born into the powerful Himekawa Group financial empire, he wields his family’s fortune to orchestrate schemes, bribing allies and rivals alike to sidestep conflicts. His flamboyant persona is marked by a stark white pompadour, piercing black eyes, and a wardrobe dominated by vibrant Hawaiian shirts. A chameleon of appearance, he activates "Super Pretty Boy" mode by smoothing his hair and ditching his glasses, transforming into an unrecognizably polished figure.

Arrogant and convinced of money’s limitless power, Himekawa avoids direct fights, favoring calculated subterfuge. He armors himself with hidden ceramic tiles to fracture opponents’ fists and wields shock batons to incapacitate challengers. This cunning mirrors his cowardice when confronted by superior foes like Tatsumi Oga or Aoi Kunieda, fleeing scenarios where wealth holds no sway.

After losing his gang and transferring to St. Ishiyama, Himekawa’s loyalties shift. He risks himself to shield Kunieda from an attack, signaling newfound camaraderie. His sharp strategic mind navigates academic negotiations to evade expulsion, while his puzzle-solving prowess aids Oga in critical missions. A skilled online gamer, he plays fairly until opponents cheat—then retaliates ruthlessly.

Himekawa’s evolution peaks with his induction into the King’s Crest, pledging allegiance to Oga and Beelzebub IV. Though still a pragmatist exploiting every resource, he trades self-serving manipulation for collaborative loyalty. Interactions once dripping with condescension now hint at genuine bonds, revealing layers beneath his opportunistic facade.