Headmistress of Sainokawahara Dorm

 is a manga-only character whose only appearance was in The Phantom Lingerie.

Manga Biography
She is the ghostly apparition of the deceased headmistress who used to run the old abandoned Sainokawahara women's dorm in Furinkan. When she was alive, her dorm was the constant victim of panty thieves. All the panties and bras on its clotheslines got stolen every night, except for the headmistress's undergarments.

She died feeling ugly, old and rejected. She hoped Happosai would steal her underwear but he refused to swipe such hideous bloomers. After she explained to Ranma and Akane that if he didn't steal her underwear before midnight, Happosai would die and be cursed to forever roam the Earth as a molesting spirit, Ranma became very motivated to make the latter do so. However, he remained unwilling, since they belonged to an ugly old woman.

Frustrated with the ancient pervert's stubbornness, Ranma stuffed the bag containing Happosai's raid for the night into a pair of bloomers. When the aged grandmaster snatched the bag back, the headmistress gleefully squealed "PANTY THIEF!", allowing her to finally rest in peace. Happosai, on the other hand, was disgusted.