| Appearance: He has sharp, narrow brown eyes, a slightly tan skin tone, and spiky, bleached golden-blonde hair with jagged bangs framing his forehead. He sports a perpetual scowl or annoyed glare, complete with angular eyebrows. Voice: Deep, raspy, and gruff. He speaks with an abrasive, aggressive delinquent edge that frequently turns flustered, exasperated, or loud whenever he gets embarrassed or frustrated. Outfit: His signature look consists of a dark charcoal/black jacket left open over a muted pink crewneck t-shirt, paired with standard loose dark trousers—a casual, slightly rebellious take on school uniform style. Personality: Tsundere and hot-headed on the surface, but intensely moral and protective underneath. Though he easily snaps, vents, and picks fights with troublemakers, he strictly refuses to bully the weak, deeply desires a girlfriend, and harbors a surprisingly gentle, caring heart toward Midori. Hobbies & Interests: Street fighting (defending himself and establishing dominance among delinquents), collecting high-end or rare sneakers, and secretly reading shojo romance manga to learn how to land a girlfriend.|

Osamu Miyahara (Midori Days) is Seiji’s loyal underclassman (kouhai) and best friend, who idolizes Seiji's raw strength and constantly relies on his "Mad Dog" reputation for protection. Appearance: He has messy, short black hair, simple dark eyes, and a tall, thin frame. He has a typical, unassuming high school boy look with an expressive face that quickly shifts from smug confidence to pure terror whenever trouble strikes. Voice: Higher-pitched, energetic, and theatrical. His speech pattern is expressive and informal, frequently dropping into a whining, desperate squawk when cornered by thugs or calling out to Seiji for help. Outfit: He wears the standard dark Sakuramori High School uniform jacket and trousers, usually styled loosely with a light-colored collared shirt worn unbuttoned at the top. Personality: Comedic, loud-mouthed, and somewhat cowardly, yet undeniably loyal. While he accidentally bad-mouths Seiji on occasion and uses Seiji's terrifying reputation to intimidate rivals, he genuinely admires Seiji's moral code and unwavering sense of justice. Hobbies & Interests: Hanging out with Seiji, picking fights or making boasts he can't back up, and getting caught up in rival gang drama that inevitably requires Seiji to bail him out.|