A Friend of the Princess

(Am I making another story with Venus de Milo in it? Yes. Did I already make a f*ck ton of stories with her in it? Yes. Do I need to update the Little Sister AU and the one with Lara, Amy, and Taly in them? Yes. Am I gonna stop talking now and start describing the story? Yes.)

The turtles have fought Shredders goons and have won time and time again. However, a new foe has joined the arena. An old friend of the Princess, Karai, herself. And she's even more deadly than the rest.