The treatment I have has Carima Niwir (Mother Skywalker in my version) as a blond wrench wench type, who starts off cute, but messy looking because she's primarily a mechanic and freight worker who's friends with Anakin and is a fellow employee on the Spice Freighter. Have a young Debbie Reynolds in my head, though that's pretty much because of the actress's relationship to Carrie Fisher.
Characterization she's the small town girl in over her head like her son while Anakin's much more the fierce and determined individual like his daughter. Her accidentally being dragged into Skywalker and Kenobi's adventure is what drives her much of her scenes with the former at first before their genuine appreciation blossoms again and grows beyond a friendship. In the long term she represents a crucial part of his humanity and its her apparent death allows him to be more more easily manipulated by Palpatine.