((This is a fan made attack on Titan character!!!))

Oka is levi Ackermans younger sister. When Kenny abandoned levi, he didn't abandoned oka, which lead levi to hate her for always being the favorite and having a better life then him.

One day oka was taking some rage out on a tree during training. She had gotten into a fight with levi and was now pissed, the tree had holds and blood on it

"Stupid.... Stupid... Stupid!"

oka mumbled to herself with every kick she made to the tree