"Ah well like that's gonna stop Frisk."
—Sans to Jaden, Syrus, and Bastion.
Sans Gaster
Sans 2




Dr. Gaster (Father)
Papyrus (Little Brother)

Dueling School

Duel Academy (as a guest)

Duel Rank


Most Used Card

Blue-Eyes White Dragon

Sans Gaster is one of the protagonists of the fanfiction story The Duelist of Mt. Ebbot (formally named Frisk the Duelist). He is the elder brother of Papyrus, and is a Pun loving skeleton. He is almost like a brother-figure to Frisk, and has a serious rivalry with Chazz Princeton.


Sans is known as a silly skeleton, but can get serious around Chazz, since he made her cry at when Frisk lost her match against him.


Sans is a short skeleton with a dimpled smile and large orbits. He wears an unzipped blue hoodie, a white t-shirt/sweater, black shorts with white stripes, and a pair of sneakers/slippers. He has white pupils that disappear when he is serious or angry. When Sans uses magical psychokinesis, his left eye flashes light blue and yellow, the colors for patience and justice, and his right pupil disappears.



Sans plays a Dragon deck, which was made through the extra cards Seto Kaiba, has given Frisk, which she decided not to add to her deck, including the three Blue-Eyes White Dragons.



Sans is a serious duelist, that gets everything ready just right.

Opponent(s) Episode(s) Outcome
Kuro Chapter 8 Win
Amnael Chapter 21 Lose (Not Shown)
Belowski Chapter 16 Win (Not Shown)
Yubel, Chara Dreemurr Chapter 16 Lose (With Zane Truesdale)


  • He is based on Sans from the Indie Game Undertale.