Final Spark

Evangeline grew up living with the horror that befell Wall Maria. She lost her home, her family... her trueself. She grew up in the Shiganshina District along with Eren, Mikasa and Armin. They call her Eva for short.
She has a really soft heart and personality and ends up smiling even when she's upset. When Wall Rose gets invaded, she completely breaks down after watching her fellow soldiers get eaten.
She has a big secret that she doesn't even know herself but recent attacks of titans are making her remember. Her nightmares get more vivid. And what happens when she gets pulled into danger with Eren?
Eren and Eva are the only chance the human race has to survive...
Can she survive through it or will she lose her sanity to pain and agony?

Sorry I suck at summaries