Big Momma Toriel

Toriel is the second major character the protagonist meets in Undertale. She saves the protagonist from Flowey and guides them through the Ruins, wishing to protect and to teach them to avoid the dangers of the Underground. Toriel is the former queen of the monsters, the ex-wife of Asgore, the mother of Asriel, the adoptive mother of the first human, and the first boss, as she guards the Ruins exit