Another Undertale Alternate Universe Fanfic

(Ok so I'm addicted to making fanfics with multiple au's, but idk how to piece them all together. This whole book is a struggle!)
As a new AU was being created, something massive had occurred. Multiple AU's were pieced together, and together the became trapped in the underground together. A human fell down into the underground, and became the hope of the underground. She meets many people of the same face, and befriends monsters.