Talk:Hamato Miwa (2012 TV series)/@comment-3121860-20190927225847/@comment-36587160-20190928000929

Before she was mutated, Baxter Stockman accidentally dumped some retro-mutagen into the serpent DNA Mutagen. Then, she was sprayed with a retro-mutagen made by Donnie. I think that's partly to how Karai regained some humanity.