Board Thread:Questions and Answers/@comment-99.164.4.58-20130427160530/@comment-6570478-20130427174401

Another thing is that April O'Neil unknowingly used a kunoichi's most powerful weapon: deception (not exactly deception, but close, for her mom probably did die). That was how she took care of Karai/Miwa. Also, could the fact that she's unaffected by the Kraang water be a clue towards why they want her, or clue in towards the rumor that she's not human?