User blog comment:B214/Question & Answers 5/@comment-50.108.164.34-20151204041232/@comment-213.120.234.154-20151206004726

Kuroka is another story entirely. Kuroka didn't really want to kill her own sister. At heart she's not truly bad, just a little bit misguided. Reynare was pure evil, plain and simple. Kuroka changed her ways, Reynare showed no remorse whatsoever for what she did, in fact she enjoyed it. There's no way she'd ever be forgiven if she did come back. Although I'd like her to come back, so Issei could finish her himself. It would make a good storyline as the last time he asked Rias to do it coz he couldn't. It would give him a sense of closure.