Aot underground
Oc/Reader is female.
Same age As Levi.
She is 5'8 (Taller then Levi)
She was born and raised in the Underground.
She has known Levi since they were kids.
She couldn't find him after his mother died so she started training her body to get strong enough to go to the surface to look for him. As he always wanted to live up there.
Years later her body has become Muscular but still lean. (Photo above or Like Korra From Legend of Korra.)
Just about as she was going to beat the guards to get to the surface, she hears people talking about a short teenager that is flying around on ODM gear and stealing things and beating people up.
Not really believing it but still something at her screamed to check it out, she does and she gets the shock of her life when she sees him and just knows it's Levi.
She and Levi Reuinte happily. Levi had been liking for her but he was told she was dead.
After a while the feeling that they had as kids Have come back stranger. And after an incident where Oc/Reader gets wounded and Levi nurses her back to health they end up confessing to each other. They are both relived that they share feelings for each other and they start dating.
Later they fight thugs that attacked them and when they defeat the thugs, the leader begs to join their group his name was Furlan.
Later a girl named Isabel joins them.
Later (How the No regrets manga Plays out with Erwin But with Reader/Oc)
When Levi goes to kill Erwin.
Oc/reader stays with Furlan and Isabel and manages to help with the titans.
Levi arrives just in time as Oc/Reader fights Tge titans by herself as Furlan and Isabel are behind her on the ground unconscious.
Reader/Oc had saved them from the titans but they were injured and Were unconcius so she put them behind her as she fought the titans stopping them from going near her friends.
Levi arrives and sees his girlfriend fighting 2 Titans as 2 other titans were dead as Furlan and Isabel are injured and behind her.
Levi helps Oc/Reader Finish off the other 2 Titans.
(then plot begins)