User blog comment:B214/Question & Answers 5/@comment-28087290-20160406222221/@comment-3965848-20160406233134

@Red Hunter Well for Tsundere types, that would be Ravel and Asia's breasts through Bilingual.

And I guess the one who comes closest to Yandere is Akeno, she seems sweet at first but obviously quite sadistic. There was also Rias and Asia for a moment at the end of Vol 7, when they smiled while giving a murderous glare when Akeno kissed Issei.