Chris Mustang

Chris Mustang, better known by the name Madame Christmas, is the proprietor of a hostess bar in Central City frequently patronized by Colonel Roy Mustang.

Personality
A rather gruff woman, Madame Christmas is the paternal aunt and adoptive mother of Roy Mustang, and is frequently sharp with him. The younger sister to Roy's biological father, Chris took her nephew in after the death of both Roy's parents, when Roy was still very young, under unknown circumstances. She's said to have raised him to become a "good man."

Introduction
At first, it would merely seem that this bar is further proof of Mustang's unapologetic debauchery, but it becomes quite apparent that the women under Madame Christmas' care act as secret informants to Mustang and his squad, and that Madame Christmas herself is a skilled intelligence operative and a contact between Roy and Lt. General Grumman in East City.

Promised Day
Well aware of Roy's ambitions as well as the clandestine goings-on of his enemies, Madame Christmas expects great things of her little boy, and worries greatly for him. In preparation for the Promised Day, Roy receives a final piece of intelligence from Madame Christmas confirming the identity of Selim Bradley. The two then retreat below the bar and blow it up as a diversion to allow Roy to go undercover, ending up killing the spies sent by the Top Brass.

Before heading up east to Xing to flee the darkness of the Promised Day and meeting up with the girls from the bar when she arrives, Madame Christmas says goodbye to her nephew by claiming from that moment on she "expects greater things from him".

Trivia

 * "Madam" or "Madame" often refers to an older woman who manages a brothel, escort service or some other form of prostitution, that is, a procuress.