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Alphys is the captain of the Royal Guard.


She is much bigger and stronger than Undertale Alphys. She wears a huge battle axe. Her armor is dino skull themed, being a dark shade of green. She has claw scars vertically across her left eye.[1]


Alphys is fierce and unforgiving. She enjoys watching anime and sometimes helps out Sans with his cooking.[2]



Alphys trains Sans.[3] Alphys also sometimes helps out Sans with his cooking.[2]


Toriel trains Alphys.[3]


  • Her name in the Genocide Route fight is "Alpha Alphys".[4]
  • In her fight(s), she throws rotating axes at the protagonist instead of arrows.[5]



  1. hello yes i would like to write some underswap fanfic, can you give us anymore headcanons? like who else has swapped and whatnot? and does sans still like puns or is that Papyrus' thing? does pap still make spaghetti? popcornpr1nce's Tumblr
  2. 2.0 2.1 about & F.A.Q Official Underswap Tumblr
  3. 3.0 3.1 Would sans still be friends with toriel and that's why he really wants to be part of the royal guard? popcornprince's Tumblr
  4. If in Undertale, it's Undyne the Undying, then in Underswap, it's Alphys the Agressive? Official Underswap Tumblr
  5. If Alphys replaces Undyne's spear with an axe, what would the bullet/arrow things become? Official Underswap Tumblr
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