Toriel is one of the facilitators of UMH. Her main goal is much like Gaster's in regards to bringing the residents of UMH to a more normal mental state. Her son, Asriel, was the first resident of UMH, so she is more driven to bring about change. Her husband Asgore works with her.
Toriel wears plain blue nurse scrubs with a pin having her name on it, and on occasion will wear a labcoat (if the need arises). When not working, she is usually seen wearing her Undertale robes.