Sartyr

Sartyr, known in Japan as Kabayama 「樺山, Kabayama」 is the head teacher at the Ra Yellow dormitory at Duel Academy with the alias of Don Simon (which is the name of a Spanish juice) or Curry Mask 「カレー仮面, Karē Kamen」 in the Japanese version. Sartyr has the sad honor of being the least featured of the three main professors. He is seen on occasion in the first season, notably in episode 2 at the Ra Yellow welcoming dinner shot. He is an accomplished chef as well as the card design teacher in the school.

Anime
In addition to being head of the Ra Yellow dorm, Sartyr teaches an art class, and can be seen doing so during episode 50 when Chumley Huffington is called to Chancellor Sheppard's office.

His only Duel was against Hassleberry in episode 63, to try and force him and his non-Slifer Red friends to return to their old dorms. He does this because he is almost completely ignored or overlooked by nearly everyone in the Academy, and with everyone else in his dorm either graduated or promoted to Obelisk Blue. However, he also does this because it was while Vice-Chancellor Bonaparte was trying to eliminate the Slifer Red dorm, and his job would have been made easier with the students moving back to Ra Yellow. He feels lonely and rejected; his lack of attention is so great, that not even Bonaparte who is watching his Duel with Tyranno from the nearby forest recognizes him at first when he is unmasked.

Ultimately, he is defeated by Hassleberry, though the latter promises to return to the Yellow dorm "from time to time" if he Sartyr continues to cook curry.

Manga
Sartyr makes an appearance in the Yu-Gi-Oh! GX manga. He appears in a panel of chapter 44, teaching a class that Chazz Princeton is attending. Later, during chapter 52, Atticus Rhodes tells Zane Truesdale that he needs to stay late in the library to finish homework for Sartyr's class.

Spirit Caller
Sartyr runs a deck called Delicious Recipe. You must defeat him to get Ra Yellow Uniform.

Deck
Sartyr plays a Spice Deck that is representative of his passion of cooking. By removing his own cards from the game with "Curry Pot", he is able to summon "Curry Fiend Roux" and increase its strength with cards such as "Red-Pepper Spice" and "Spell Spice Caraway".