Christmas Party is an AU where it's basically an AU get-together for the skeleton family. There are a load of Sanses, Papyruses, and a Gaster as well! Mostly Sans, though. It's hosted by the Sans from Aftertale, and currently has Classic Sans, Classic Paps, Classic Gaster, Underswap Sans, Underswap Paps, Underfell Sans, Underfell Paps, Science Sans, Reapertale Sans, Error Sans and Underfresh Sans as guests.

About the AU

What happens when Sans from Undertale throws a Christmas Party and invites his alternative selves to come join him? Jokes, drama, fluffy moments, and that dang spiked eggnog. Starting with Sans Classic, Science!Sans, Underfell!Sans, Aftertale!Sans, and Underswap!Sans, the comic is ongoing with new additions showing up as it progresses.



  • Undertale Sans (AKA Sans Classic)
    • Often appears with Geno.
    • Gets accused of spiking the eggnog, but doesn't actually.
    • Victim to Reaper Sans's Deathly Face Touch.
    • Wears red sweater that says "Bite Me." and has a gingerbread man on it.
      • The gingerbread often reacts the same way whoever Sans talks to reacts.
  • Underswap Sans (AKA Blue)
    • President of the Friend Club.
    • Spiked the eggnog.
    • Believes that with Hershey's Kisses, everything is solved. Unfortunately, he only brought one.
    • Has murdered people with tacos before.
    • Wears green sweater that says either "Waiting 4 Sansta." or "Mr. President."
    • Practically evil to Science!Sans
  • Underfell Sans (AKA Edge)
    • Member of the Friend Club.
    • Often appears with Science Sans.
    • Wears a brown sweater that says "Scary Christmas." and has a skull on it.
    • Swears ALOT
  • Aftertale Sans (AKA Geno)
    • Hosts and hates the party.
    • Refuses to stop drinking the spiked eggnog.
    • Is a masochist, according to Reaper Sans.
    • Often appears with Sans Classic, Underfell Papyrus, and Reaper Sans.
    • Gets triggered when Underfell Papyrus says Underfell is tough
    • Wears a green sweater (over his red wound) that says "Chilled to the bone." and has a skull on it.
  • Science!Sans
    • Minister of War of the Friend Club, and tries to usurp Blue.
      • Ends up losing against Blue's Friend-chmen.
    • Finds out the eggnog is spiked, which has nasty side effects on his... thoughts.
    • Often appears with Edge or Blue, but rarely with both at the same time.
    • Wears a green sweater that says "Merry Mathmas." and reddish glasses.
  • Reaper Sans
    • Arrives later than the above Sanses.
    • His Deathly Face Touch is useless in the void, since people can't die there.
    • Often appears with Underfell Papyrus or Geno, but never with both at the same time.
    • Is a sadist, according to Geno.
    • Wears a brown sweater that says "Death the halls." and two scythes.
  • Fresh!Sans
    • A Friend-chman of Blue
    • Official messenger of Friend Club.
    • Harasses Science!Sans about the side effects about the spiked eggnog.
    • Wears glasses that either say "HOHO" or "RUDE" (When Underswap Papyrus ignores him).
    • Wears a mostly green sweater that says "Ho Yo Lo Bro."
  • Error!Sans
    • A Friend-chman of Blue
    • Is seen as a higher threat by Underswap Papyrus over Freshtale Sans.
    • Wears a purple sweater that says "Nooo, Asgoro!"


  • Undertale Papyrus
    • Cooks everyone Christmas Spaghetti, which ended up looking more like sausage pizza.
    • Gets invited to Friend Club, but he denied.
    • Wears a green sweater wrapped up in Christmas lights.
  • Underswap Papyrus
    • Overprotective of Blue
      • Punches Error!Sans, and tells him to not touch Blue.
    • Tries to settle the conflict between the Underfell brothers.
    • Appears almost equally with all the characters (except Papyrus Classic and Gaster).
    • Wears an orange sweater that says "Ugly Christmas Sweater."
  • Underfell Papyrus
    • Acts like a dick to his brother. (Acts good to his brother after the Underfell theraphy with Geno)

W. D. Gaster

  • Unknown AU Gaster (Thought to be Gaster Classic)
    • Is probably the most random character, tied with Freshtale Sans.
    • Technically father of Sans, Papyrus, Science!Sans, and Geno.
    • Believes that he is able to turn invisible by himself.
      • Also believes that Reaper Sans is the only one able to bypass this.
    • Believes that he can explode rabbits by thinking about it. Yeah.
    • Wears a red sweater that says "Chemistree." and has a Christmas tree on it.


  • The only people to drink the spiked eggnog are Sans Classic, Edge, Geno, and Science!Sans.
    • Reaper Sans brings his own Starbucks to the party, and drinks that instead.
    • The other characters never drink anything.
  • The only things to eat at the party are Christmas Spaghetti and pretzels.
  • Papyrus Classic is the only one without words on his clothes.
  • Underfell Papyrus is the only one not wearing a sweater.
  • Tacos are deadly weapons.


Christmas Party AU Movie (Undertale Comic Dub)34:21

Christmas Party AU Movie (Undertale Comic Dub)

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