User blog comment:B214/Question & Answers 5/@comment-72.220.143.12-20151012043030/@comment-1359322-20151015020602

@Ran, yes they are technically in the same shoes with Sirzechs and Grayfia except for the number of children that is.

@anon, yandere is someone who is kind to the person they love but will turn into some insane/crazy person just to monopolize the one they love. In short, yandere don't want to share. So there is no way a yandere can fit into Ise's harem, the girls won't allow them to monopolize Ise.