Shoto Todoroki trains as a hero student at U.A. High School. His appearance is marked by heterochromia—a turquoise left eye and dark gray right eye—and hair precisely divided, white on the right and crimson red on the left. A significant burn scar covers the left side of his face, originating from a childhood incident. He stands 176 cm (5'9") with a muscular physique. His hero costumes integrate temperature regulation for quirk use, utilizing heat-resistant materials, cooling/heating devices, ice-resistant boots, and utility belts carrying medical supplies. Later versions add stealth capabilities and enhanced bracing for power condensation. His background is defined by intense familial conflict. Shoto is the youngest son of Enji Todoroki (Endeavor) and Rei Todoroki. Endeavor engineered a quirk marriage seeking a child who inherited both his fire quirk and Rei's ice quirk to surpass All Might. Endeavor subjected Shoto to abusive training from age five, isolating him from his siblings—Toya (later known as Dabi), Fuyumi, and Natsuo. Rei opposed this treatment but endured abuse herself. Her deteriorating mental state led her to pour boiling water on Shoto's face when triggered by his resemblance to Endeavor, causing his scar. Rei was hospitalized afterward, and Toya was later presumed dead following a training accident. These events fueled Shoto's deep resentment toward Endeavor and his refusal to use his inherited fire quirk, associating it with his father's cruelty. Initially aloof and cold due to trauma, Shoto displayed arrogance and favored solitary action. He entered U.A. through recommendation but rejected teamwork and social bonds. His quirk, Half-Cold Half-Hot, generates ice from his right side and flames from his left, with overuse risking hypothermia or heatstroke. Early combat relied solely on ice, symbolizing rebellion against Endeavor. His U.A. Sports Festival battle against Izuku Midoriya proved pivotal; Izuku's insistence that Shoto's power was his own reignited memories of Rei's encouragement to embrace his identity. This confrontation prompted Shoto to use his fire in combat for the first time since childhood. After reconciling with Rei post-festival, he gradually accepted both sides of his quirk. Shoto subsequently became more sociable, though he retained bluntness. He interned at Endeavor's agency for tactical advantage despite unresolved animosity, acknowledging Endeavor's professional skill while demanding accountability for past abuse. His quirk mastery improved through training, learning techniques like the Flashfire Fist and integrating fire and ice for attacks such as Flashfreeze Heatwave. During the Paranormal Liberation War, he discovered Dabi's true identity as Toya, whose envy of Shoto fueled his villainy. Shoto resolved to stop Toya himself, recognizing parallels between Toya's hatred and his former self. He later offered Endeavor reluctant cooperation to save Toya, emphasizing their shared responsibility. Key relationships include his enduring bond with Rei, whom he visits regularly; his rivalry with Katsuki Bakugo, marked by mutual recognition of strength yet complicated by Katsuki's frustration over Shoto's initial withholding of power; and his friendship with Izuku, whose influence helped Shoto reassess his father's capacity for change. Endeavor's efforts to atone prompted cautious optimism from Shoto, who acknowledged the possibility of future forgiveness but insisted it must be earned. Eight years after the Final War, Shoto graduates as the No. 2 Pro Hero. His scar fades slightly, and his physique becomes leaner and more muscular. He continues using an upgraded hero costume featuring enhanced temperature-regulation capabilities.