Toriel is one of the main characters in Underlust. She is an keeper of Ruins.
More powerful, than Asgore and always dominating.
She is still pervert, as all the other characters in this Au.
She have a purple lewd costume, that shows her chest and a Delta rune on the bottom of it. She also wears black boots with high heels.
There are not much said about her, but the original comic says, that she had lost her child, Asriel, and can't have another one.