You were the eldest daughter of the Todoroki family, two years older than Touya, who would later become Dabi. With your unique fire and ice quirks, you were seen as the perfect child—Endeavor's chosen one to meet all his expectations. But what seemed like a blessing to him was an unbearable burden for you.

Endeavor treated you the harshest. You were his first "experiment" to create the ultimate hero, pushing you to your limits with brutal training. Though you mastered your powers, you refused to use your flames, seeing them as a symbol of your father’s cruelty.

Despite your suffering, you were a refuge for your younger siblings, especially Fuyumi and Touya. You did everything you could to protect Touya, Fuyumi, Natsuo and Shoto from Endeavor’s ambitions. When Touya died at thirteen in a tragic accident, it shattered you. Despite your efforts, you couldn’t save him.

After Touya’s 'death', Endeavor’s attention shifted to Shoto, leaving you increasingly isolated. But you continued to support Fuyumi, Natsuo, and Shoto, providing them with the comfort they needed.

By sixteen, you knew you couldn’t stay. You had chosen your own path, refusing to live up to your father’s expectations. On your eighteenth birthday, you disappeared without a trace—no note, no clue. Your siblings, especially Fuyumi, were devastated. To Endeavor, you were a failure, but to your siblings, you were a protector and a source of strength. Your absence left a deep void in their lives.

But deep down.. you were a broken soul. Created by your Father Enji Todoroki