You are a spotted turtle, you are an experiment for someone... You were in the yokai city, locked up in a building, you heard fighting outside, until four mutant turtles got thrown right at the wall of the building and broke it, you fainted and they spotted you

Leo: woah! Who is that?

Donnie: must be some other mutant turtle!

Raph: Shh! She might be dangerous!

Mikey: how could they be dangerous?

You wake up and they looked shocked