Shinji Ito transfers to Nanyou High School seeking to reinvent himself as a delinquent, leaving his ordinary past behind. Standing 180 cm tall, his imposing presence reaches 205 cm with his distinctive hairstyle, yet this contrasts sharply with his strong moral compass. He embodies a powerful sense of righteousness, consistently fighting for justice rather than personal gain, directly opposing his counterpart Takashi Mitsuhashi's self-centered approach. This core difference shapes his combat style, relying on exceptional toughness and endurance. He frequently absorbs punishment to protect others instead of evading attacks, sustaining more injuries due to his willingness to fight fairly against overwhelming odds or multiple opponents. Early on, Ito intervenes to rescue former sukeban girl Kyoko Hayakawa from thugs. This protective act, despite its physical cost, leads to their relationship. Kyoko's parents approve, expressing relief she dates Ito rather than Mitsuhashi. Throughout various arcs, Ito's unwavering moral stance and protective instincts define his interactions. He develops a respectful dynamic with Benibane High's banchō, Katsutoshi Imai, acknowledging Imai's honest efforts despite intellectual shortcomings. Ito's background reveals a deliberate choice to embrace delinquency upon transferring, yet his actions consistently align with a code of honor and defense of the vulnerable. His development maintains this core integrity, with his relationship to Kyoko serving as a stabilizing influence. While his physical prowess matches Mitsuhashi's, his defining traits remain his tendency toward self-sacrifice and principled combat.