Mindful Corruption-An Undertale (AU?) Fanfiction

Aurora is a strange monster. The only thing she and Sans can find within her form is wolf, dragon, angel, and skeleton. What do the strange markings mean near her eye socket and other places? Why does she feel weird whenever she's near the Core or the Lab? And is there any other monsters out there like her? Aurora doesn't understand, and now the entire underground is acting strange. Well, except Sans and Papyrus.

"There's a reason for everything," Aurora explained to herself, "I just need to find them."