For Team Switched's rendition, see Sans/Team Switched.
— Sans' catchprase

Sans is the brother of Papyrus. He is training to become a Royal Guard with Alphys.



Sans wears an outfit similar to Papyrus from Undertale, where he wears a bandana, a cape and boots all in blue, and a grayish shirt with dark blue pants. Papyrus made a statement that this was actually a costume for a costume party but he has so much enthusiasm into it to where he rarely takes it off ever since.


Sans is flamboyant, excitable, loving, and enjoys making tacos for his friends.[1] He is also quite kind to others, such as the protagonist will never be killed by him; instead, Sans captures the protagonist if the protagonist reaches one health bar.

Sans enjoys tacos (and burritos) instead of spaghetti (Italian food being swapped with Mexican). Though, he seems to have an extreme intolerance towards sugar, as it'll make him way more hyperactive than he already is.[2] and likes to say "MWEH HEH HEH". He still enjoys making puns.[3] He also likes riddles instead of puzzles.[2] He will often refer to himself as the 'Magnificent Sans' and dislikes it when Papyrus makes fun of it. He is shown to love Papyrus brotherly despite nagging about his laziness often.


  • Song that might play when you fight Sans was Popcornpr1nce's original choice for him, because it’s so cute and upbeat. But he finds remixes of MEGALOVANIA pretty sweet too.[4]
  • Blueberry is not a canon nickname, it's a name from the Fandom.
  • Yandere Blueberry is not canon, it's a totally different AU.
  • Blueberry is sometimes teamed up with Ink! in some cases.


  1. character personalities Official Tumblr.
  2. 2.0 2.1 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.
  3. OK SO, I thought what if theres an AU in which the... Popcornpr1nce's Tumblr.
  4. Wait... so would that alt. version of "Megalovania" play when you fought Sans, or would "Song That Might Play When You Fight Sans" play? Popcornprince's Tumblr.
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