Faith MacDuff is a Sim introduced in The Sims 3: Supernatural. She lives in Moonlight Falls with her parents, Flint and Joanie MacDuff and her siblings Jules, Joe and Felicity MacDuff. Her bio makes no mention of her magical powers (in fact, it directly - though inaccurately - states that she has not inherited her father's witchcraft), strongly implying that she does not know she is a witch yet. It is possible that her life state is an error by the developers. She is at level 4 in her painting skill and carries a copy of "On the Margins" and a wand in her inventory, despite not knowing she is a witch.
Faith is best friends with her mother, Joanie, good friends with her father, Flint, and friends with her siblings, Felicity, Joe and Jules. She does not know anyone outside her family. Despite her bio implying that she does not get along well with her brothers, she is in fact the only one of the MacDuff children to have a positive relationship with all three of her siblings.