What is a kunoichi? A kunoichi is a female ninja. a fearsome and sometimes deadly warrior who specializes in sneaking up on their enemies without being seen .... until it's too late! Here you can not only dress up a kunoichi. but you start with designing her costume. A typical ninja costume is all black. but that's a bit boring if you ask me! Why not try a hot pink top with purple details? I think it will only confuse her enemies as they might not expect a deadly ninja being dresses in a pink top! :)