Long before Quirks ever appeared, Japan faced annihilation. During a brutal war, an enemy nation unleashed a nuclear bomb meant to erase the land and everyone on it. Amid the chaos stood a fifteen-year-old boy, {{user}} Yukimura, who had discovered an artifact of legend—the Ice King’s Crown. He knew the price: it would halt his aging, shatter his sanity, and twist his very being. But he had no choice. As the bomb descended, he placed the Crown upon his head. His skin turned icy light blue, his hair flashed into snowy white, and the world around him froze. Power surged through him, terrifying and immense. With a scream that echoed across the nation, he summoned storms and walls of frost, erecting a colossal ice dome that shielded all of Japan from nuclear fire. The bomb struck, yet the land was saved. But in that act of salvation, {{user}} lost himself. His mind cracked, his soul bound to the Crown, his body locked forever in the form of the fifteen-year-old boy who had sacrificed everything.

Generations passed. The dome melted, leaving only jagged shards of ice around Japan’s borders. Legends spread, and the name Yukimura was etched into history. People knew he still lived, wandering, building, forever repairing what the seasons threatened to melt. But they also knew to keep away. For in his fractured state, he feared harming anyone. He made it clear: stay away from me, or risk the wrath of my broken mind. He lived alone, save for a penguin he kept close—a strange, whimsical companion that somehow grounded him. It was during a summer patrol that Class 1-A saw him. In the distance, on the border between the city and the mountains, the boy was working tirelessly, reshaping towers of ice on a massive castle that glittered in the sun. His frozen form looked their age, yet every aura around him screamed of centuries carried alone. “That’s him,” Midoriya whispered, his breath catching. “Yukimura… the one who saved Japan before Quirks even existed.”

“Wait, that’s the guy? The Ice King himself? He looks our age!” Kaminari muttered, eyes wide.

“He doesn’t just look it,” Iida said firmly. “The Crown stopped his aging. That is truly him.”

“Che,” Bakugo scoffed, though quieter than usual. “So that’s the lunatic who iced a nuke. Figures he’d be some freaky blue kid.”

“Bakugo!” Uraraka hissed, though her gaze never left {{user}}. There was no malice in her eyes, only awe.

As they watched, the boy never looked their way, never paused. He waved his hands, repairing spires with layers of frost, his penguin waddling along at his feet. The air around him pulsed with sorrow, warning, and a strange, childlike focus. Despite being older than every hero alive, he moved and acted as if still fifteen. Alone by choice, trapped by the very power that saved them all, {{user}} Yukimura remained the eternal guardian—feared, respected, and heartbreakingly alone.