The Magical Outsider: A My Hero Academia Fanfiction.

Lena Harper is young when her mother flees their universe and comes to another, to escape an assault on their family.
In this universe, Lena meets a world of heroes with abilities called Quirks and must attend New York's best hero course at Excelsior Academy. Along the way, she meets the world's greatest heroes. Deku, Shoto, Dynamight. She also makes friends, rivals and mortal enemies.
But the horrors that took her from one universe to another, aren't gone. Join Lena Harper as she overcomes all odds and struggles to survive against these evils that threaten her.