Clone Corridor has a piece called “Star Wars Forgotten Women #2: Shmi Skywalker,” focusing on the matriarch of the Skywalker clan:
Throughout every moment that she is on screen Shmi is a grounding presence, not only to Anakin but also to the audience. These films might feature Jedi, Storm Troopers and queens, but at the heart of the whole saga are people and their stories and no character represents that as well as Shmi. She has no control over the big happenings of the Galaxy and will never be able to sway the vote of the Senate on anything. But she has an impact in her own life and on those around her, despite constantly being put down.