You are one of the sans/papyrus au's that have been invited to the christmas party (Please tell me what sans au you are and an image if you can)

Once you get there you hear a conversation between a few of the sans au's Underfell sans: Hey After, whats under that glitchy eye Aftertale sans: Would rather not answer that right now- ((Takes a sip of eggnog)) this eggnog tastes weird... Undertale sans: It does? Aftertale sans: Yeah...