Moonlight Madness

Faith is a rare mutant that caught Oruku Saki's eye. She was the first ever mutant that was able to change forms. Rahzar and Karai kidnap her to have Baxter Stockman experiment on her. Faith was able to convince the Shredder to let her out to fight the turtles. She lied. Michelangelo went to fight her, in return she attacked him.
The turtles soon realize Faith had no where to live they offered her to live with them but then she declined their offer. Faith knew when it was time to leave she would never return. But she changed her mind. Then a week later of spending her time at their lair, Faith began to sneak out. Then Raphael noticed and convinced her to stay and not leave.
Soon both Raphael and Faith begin liking each other and end up together! They love each other more than their own lives. Faith became Michelangelo's best friend who will play videogames and eat pizza with him.
Hamoto Yoshi became her practical father and the turtles, April, and Casey all became her family.