Watched the show, loved it. Meat Cierra. She loved watching the show and Playing Undertale until she got sucked into the Series by the Mayor. Apparently after LBD dies her powers became Cierra's. MK rescues her and she discovers she has the powers and Monkey King tells her she can't use them but the Mayor forces her to. Then Mei and Redson go to rescue her and Mei tries to convince her to take control of her powers and make them her own, like something she knows. That's when she soon thinks of LBD's Motif, bones and blue, just like Sans, so she turns them into Sans styled Powers and beats Mayor, becoming a part of the gang and turning the Trafic light Trio into the Christmas Light squad. She even starts dressing like her favourite Skeleton and cracking jokes, finding she's more like her favourite Skelebro than she thinks.

Made the character in Piccrew and edited it

Also she has a Ponytail

So recap, girl gets sucked into her favourite TV show and becomes Sans

(That was  kinda the whole reason I made this OC like this)