Board Thread:Questions and Answers/@comment-65.130.222.229-20130209231901/@comment-1169536-20130215222710

I personally assumed since the moment Karai appeared that she is, in fact, Miwa, Splinter's kidnapped daughter raised by a Shredder. The authors have made some very clear distinctions that Miwa survived and, I assume, was most likely kidnapped by Shredder, so this does make a great amount of sense.