My Hero {updated}

The first thing Sara White registered was a profound shift in her environment. One moment, the air was thick with the sterile, anodyne scent of a hospital recovery room, the fluorescent hum a grating intrusion. The next, a soft, enveloping warmth cradled her, a gentle pressure against her back, and brilliant golden eyes looked down upon her, reflecting a tiny, blurry image. A soft coo, like the whisper of doves, filled the air, followed by a man with striking white hair, his smile mirroring the woman's unbridled joy.
"Our little Aimi," the woman cooed, the name striking a chord deep within Sara's nascent consciousness. Aimi Matsuzaki. Her own creation, a fanfiction character.
Then it crashed down, a tidal wave of realisation. This wasn't a dream. This was My Hero Academia. She, Sara White, was now Aimi Matsuzaki: a bright young woman with long white hair and brilliant gold eyes, who had a powerful healing quirk capable of regenerating lost limbs. She knew the downside too, since she created Aimi: overuse could lead to fainting, collapse, even death, though resistance could be built with training, requiring sleep and sugar to recover.
Inheriting not just a new body but an intimate, encyclopedic knowledge of quirks, hidden alliances, and the devastating betrayals that would tear UA High apart, Aimi understood. Every tragic death, every villain's rise, every hero's fall - it all played out in her mind with terrifying clarity. She held the power to rewrite history, not with a pen and paper, but with her very existence. The thought settled in her, a quiet, steel resolve hardening behind her innocent infant smiles. No longer content to watch beloved heroes fall and villains rise unchecked, a tiny hand instinctively grasping a finger offered to her, Aimi vowed to alter the course of events. Her future, and theirs, depended on it.

(Some characters might be aged up and some will be aged down)