Hisano, the old woman who is the Death social link of P4. Her husband lost his memories from old age and died, and she simply can't deal with the fact he couldn't remember her and now he's gone. She actually tells you, "I am Death" and believes it.
Ms. Kashiwagi is the teacher who replaces your old homeroom teacher, Morooka, in P4. Everyone seems to think she's ugly for some reason...I think it might just be her age that's putting everyone off. Yet she is more than willing to come on to the boys in class. In the MC route of P3P, she even attempts to seduce a very confused Akihiko at the beach! =)
Ayame, one of the possible Sun links for P4. I seriously thought she was Nanako's age when I first saw her, so the idea of dating her is creepy to me. Like Chihiro from P3, she really lacks the self esteem she needs to be successful. I personally like Yumi's version of Sun better, this girl just doesn't have the allure of Chihiro to keep me interested.