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Undersail is an AU that takes place underwater in the Ebott Triangle. This AU was made as a design aesthetic and had no canon. There is also no plans for canon, either.[1]


  • Frisk is a diver who gets an air bubble from Toriel.
  • Sans and Papyrus are both pirates.
  • Flowey is an anemone.
  • Toriel and Asgore are capricorns.
  • Undyne is a mermaid.
  • Alphys is an axolotl.
  • Napstablook is a jellyfish ghost.
  • Mettaton is a bathyscaphe.



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