Megami Ibunroku Persona: Harem Queen

Harem Queen, Chisato Kasai uses a mirror to petrify Naoya's party except himself and Maki. They return to normal after the mirror breaks. There's also a manga adaptation in which the characters turned to stone are Masao, Kei and Eriko and after being revived and informed on what happened, Eriko commented that it sounds exciting and wishes she could have stayed a stone statue for longer.