She knows whats best for you.
[WARNING: SPOILERS FOR UNDERTALE]
Toriel is the guardian of the Ruins. She found Frisk when they were fighting Flowey. She wants a child of her own, so she tries to convince Frisk to stay in the underground. She is able to bake pies. She is the husband of Asgore and mother of Asriel and Chara. When Asgore became angry with the humans she was disgusted by the way she acted and moved away.