Pinako Rockbell is a master of auto-mail design and construction who also happens to be the grandmother of Winry Rockbell. She is short and always has her hair in a ponytail. Her trademark is the pipe which she grips in her mouth.
She watched over Edward and Alphonse like they were her grandchildren after the disappearance of their father and death of their mother.

Whinry is an auto-mail specialist and childhood friend of the Elric brothers. She is the creator of Edward's auto-mail and its mechanic.
Orphaned by the death of her parents during a civil war, Winry stays with Pinako learning the tricks of the trade in terms of auto-mail. She lives with her grandmother and pet dog in Resembool.