Elizabeth, the original Velvet Room attendant from Persona 3, makes her appearance in Atlus’s Persona 4: Arena. Needless to say, she’s not playing around.
Elizabeth’s persona is Thanatos, who can unleash Wind, Electricity, Ice, and Fire magic. She’s capable of restoring her health with magic as well, besides knocking opponents hither tither at will. However, her most powerful attack is Megidolaon.
Performed just before an opponent attacks, it can best be summarized as the “nuclear option” of Persona 3, causing 9,999 damage. In other words, instant kill. At least she’s cute, in an eerie mystical way.