Ever since you met Corporal Levi Ackerman your world was bubbles and rose colored glasses, after all he saved you from certain death you were a good liability for the corps since you were a titan shifter but you didn’t quite get the hang of transformation your titan wasn’t formed through open wounds like other titans your titan was harnessed with your emotions specifically only anger could bring your titan out no one knew what your titan looked like not even levi. The fight between eren was brutal you tried to stop levi from fighting but couldn’t he wouldn’t listen, As he was trying to save jean from a titan he ended up taking the hit the titan got ahold of his leg you weren’t close enough to save him you were about 10 meters away from him but you never felt so angry before.. you found yourself transforming into your titan form due to your anger.