Fans of the Persona roleplaying game series will remember Margaret from Persona 4 as the dapper assistant of the mysterious Igor, lord of the equally mysterious Velvet Room. Since Margaret has such close ties with the likely supernatural Igor, she boasts more than her fair share of Personas. According to Atlus, Margaret will enter battle armed with "three Personas, Cu Chulainn, Yoshitsune, and Ardha, and a staggering eight Persona cards."
Like Adachi and Marie, Margaret will appear after the debut of Persona 4 Arena Ultimax as a DLC character. Unlike those two, however, Margaret will only come available a week after the game's launch and will not be included in the "FreeLC" promotion that grants the former two fighters to players at no charge. There's currently no word on how much the Margaret DLC might cost.
Persona 4 Arena Ultimax