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Altertale is an Undertale AU created by friisans where six characters have changed their roles with others. Sans has swapped with Toriel, Papyrus with Asgore, and Gaster with Asriel. There are no other swapped characters whatsoever.

AUs of Altertale by friisans include:

Character Swaps

In this universe of characters, 6 characters vary, but some qualities of some characters prevail over the other.

  • Sans — Toriel
  • Papyrus — Asgore
  • Asriel — W. D. Gaster

For example, AT Sans is 80% the personality of Тoriel, but only 20% the personality of Sans, and Toriel is 80% the personality of Sans, but only 20% the personality of Toriel. (AlterTale Sans = 80% of UT Toriel's personality + 20% of UT Sans' personality, and AlterTale Toriel = 80% of UT Sans' personality + 20% of UT Toriel's personality)

Character List

all images on this list are made by friisans.

Sans The ruinskeeper and former king of the Underground. He left the throne to go reside in the ruins after his brother betrayed him, and housed all 6 children before they were killed.
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Papyrus The king of the Underground and responsible for the deaths of the 6 fallen children. He has been burdened with tremendous guilt and deeply wants forgiveness, and to see his brothers again.  
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Gaster The late prince of the Underground and the younger sibling of both Sans and Papyrus. He was the first monster since the war to come across a fallen human.
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Asriel The mysterious goatman who used to work under king Papyrus as the royal scientist. He was ripped from existence after falling into the core, and only Toriel and his 3 followers seem to remember him.
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Asgore The young and charismatic fluffybun who dreams of being in the Royal Guard. He is pure-hearted and kind to everyone.
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Toriel The lazy sentry of the underground and the first monster you meet outside the ruins. Silly and fun, she helps guide Frisk through Snowdin and her brother’s wacky puzzles.
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Fun facts

  • The creator of the AU, friisans, when confronted with the question "Is there Soriel in Altertale?" simply replied "hell yeah."
  • friisans has also spoken on the topic of Fontcest and Goatcest, saying that they are not (and never will be) canon.

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