The Turtle Love Triangle

While April, Master Splinter, and the turtles are kidnapped, there is a new commer that has also become enemies with the Shredder. While helping them escape, the turtles discover her secret. Her name is Fang Knight, and she is not your average person. During all this she finds out that 2 of the turtles like her, even after they know what she is. What is her power? And what 2 turtles "like" her?