kittycat_shinobu
Shinobu's parents and older sister were heroes and so it would only make sense for her to be one as well. Well she was the exact opposite she was a villain. Now you may wonder why but all her life Shinobu had been neglected and mentally abused by her parents and 'friends'. Everyone thought her older sister, Kanae was so much better than her. So it wasn't a surprise to her when she was kidnapped by scientists and held ransom, and if the money wasn't payed they'd experiment on her, and her parents refused to pay. So she went missing for 6 years 2 of those years were spent being an experiment and the other 4 years were spent being a villain.