Yellow; A RotTMNT fanfic

6 years before the four mutant turtles meet Baron Draxum, they meet a small girl aimlessly walking through the sewers. They were hesitant to make themselves known, until they find that the girl was legally blind without her glasses. The closest thing you can get to blind while still seeing. They become close as she moves into the lair and becomes a sister to them. But after only 2 years of knowing each other she disappeared. 4 years latter she stumbles into the lair, once again with broken glasses... And a mystic bow... Is she more important to this story than just another human friend? What's with the two long scars down her back? And why is Donnie acting so... Caring towards her?! Does he just miss his friend, or is it maybe a crush? Read to find out!!!
(This is a Fanfic, I don't own any other characters other than my oc Zoey)