Haru Minakami, a second-year high school student, transitions from a rising triathlete to a key member of the Blue Skull biker gang, sporting spiky blonde hair, a signature blue bandana, and a brash youthful energy. Drawn by admiration for gang leader Jun Aoi, he evolves into an unwaveringly loyal disciple, treating Jun as an idolized older brother and executing his commands with zealous precision.

His combat prowess revolves around blood manipulation: conjuring massive, hardened fists for brutal close-range strikes and shaping blood into dense orbs that ensnare foes, suffocating them in crimson liquid. He fights with reckless physicality, often crashing into skirmishes with explosive momentum—like intercepting enemies mid-charge with a devastating punch.

Haru’s past ties him to childhood friend Akira Harabuki, who futilely urges him to abandon AVAL. He disregards her pleas, clinging to Jun’s faction even as tensions escalate. His story ends in tragedy when AVAL operative Kaburagi Kark betrays him, striking him down from behind moments after Akira sacrifices herself to block Kaburagi’s initial lethal blow aimed at Haru.

Though fiercely dedicated, Haru operates as a pawn in larger conflicts, his naivety and incomplete grasp of AVAL’s ambitions marking him as an inexperienced outlier among the group’s seasoned members. His arc frames loyalty as both his driving force and fatal flaw, painting him less as a villain than a misguided follower consumed by devotion.