Eijiro Kirishima, hero name Red Riot, channels relentless determination forged through overcoming profound self-doubt. Haunted by middle-school timidity—particularly an incident where fear paralyzed him during a crisis—he questioned his heroic potential until discovering retired legend Crimson Riot’s philosophy of unwavering courage and living without regret. Embracing this ethos, Kirishima reshaped his identity: dyeing his hair jagged crimson as a vow of resolve and enrolling at U.A. High to master heroism. Boisterous and fiercely loyal, Kirishima champions bravery, honesty, and self-sacrifice, often praising deeds or people as “manly” in homage to Crimson Riot. His gregarious exterior masks a relentless drive to prove himself, spurred by lingering guilt over past inaction. He prioritizes allies’ safety above protocol, yet privately trains rigorously to avoid burdening others, channeling regrets into unyielding growth. His Quirk, Hardening, transforms his body into a living shield of rock-like armor, initially deemed unremarkable until relentless conditioning—like enduring Mashirao Ojiro’s tail strikes—sharpened it into a versatile weapon. Kirishima dominates close combat, absorbing blows before retaliating with crushing force. The apex of his power, Red Riot: Unbreakable, pushes Hardening to near-indestructibility for 30-40 seconds, though exhaustion follows swiftly, demanding precise timing. A defining trial came during the Shie Hassaikai Raid, where yakuza enforcer Kendo Rappa’s onslaught nearly shattered Kirishima’s resolve. Rallying through memories of past failure, he shielded mentor Fat Gum, enduring devastating strikes to protect others—a pivotal act that solidified his reputation as a steadfast protector. His bond with Katsuki Bakugo thrives on mutual respect; Bakugo’s rare acknowledgment of Kirishima as an equal underscores their shared tenacity. Post-graduation, Kirishima ascended to No. 12 Pro Hero. His costume merges practicality with symbolism: reinforced sleeves safeguard civilians during rescues, while oni-inspired shoulder pads and a frayed cape echo his indomitable spirit. Off-duty, he favors hearty meat dishes and consistently ranks among top fan-favorite heroes. Weaknesses temper his power: sustained assaults erode Hardening’s integrity, and Unbreakable’s fleeting duration demands strategic precision. Yet Kirishima’s journey—from insecure teen to a hero embodying Crimson Riot’s ideals—proves his mantra: true strength lies in rising after failure, unbroken.