Board Thread:General Discussion/@comment-27229742-20151020041356/@comment-27229742-20151112064911

The tenth rival will not be a yandere, which lowers the chances of there being yandere rival at all. Also, check the rivals page. I think that since the rivals will never know that they have competition for Senpai, then they probably aren't yanderes since a yandere would notice that Yandere-chan changes things around Senpai. You can also matchmake the rivals. What kind of yandere falls for another man?

Your theory is cool, but she might not be a rival. If is this impressive because when a yandere has someone to protect, they become capable of almost anything. Yandere-chan can kill almost any NPC she sees, then how tough would killing another yandere be? There will be no other persona that will kill you to try to stay safe. That also lowers the chances of a yandere at school, since a yandere would want to see tomorrow for her crush.

The other yandere could be Info-chan if she is the daughter. It's the most logical explanation. You will never see her at school, so that explains the part about killing her, a bit. But her persona is Evil! If you were to kill her, shouldn't she be able to kill you too since she is a yandere? Or at least fight back like a Hero, but to stay alive for her crush and not for the right reasons? Info-chan's persona, or any yanderes, would probably be something like loyal. That's what yanderes are known for, after all. I know the Dev possibly only meant that Yandere-chan and the mother had this persona, but it would make sense for another yandere to have the same thing! Yanderes are known for their loyalty. They'd do anything to get with their crushes.

Also, I don't think that a minor character who isn't a rival nor Info-chan would have such a big secret. The Dev said that all the rivals and no NPCs will have dark secrets. He probably wasn't thinking about Info-chan or The Journalist at that time, though. He has forgotten before, after all. Also, think about how The Journalist, Info-chan, and Ryoba Aishi, people with dark secrets all won't appear in normal gameplay, save for endings probably. That greatly lowers the chances of there being a yandere at school! Info-chan is in her own little club exempt from school rules, which might explain why she attends school but you'll never see her. If Info-chan is the only one in that club and she might not be a yandere, then the daughter might not be a yandere. To me it seems likely and unlikely at the same time.