Redemption (Levi x OC)

The Underground. A forgotten city littered with sleazy business and underhanded dealings. Meredith had known no other life than the one this city offered, unconsciously indoctrinated into the life of contract killing since she was a child.
So when Keith Shadis, the Commander of the Survey Corps, and Erwin Smith, a bold and strong-willed section leader, come to her unwanted rescue with a proposal, the trauma she had buried deep inside her threatens to spiral her mind out of control.
She has lost everything, suffering with her own sins by herself. But in the midst of her self-torment, she meets three thugs that have also known the horrors of the Underground and she finds herself feeling a little less lonely in the strange world of sunlight and Titans.