Damon, known in Japan as Taira Taizan, is a former Obelisk Blue student who is obsessed with drawing.
Damon was an Obelisk Blue student who couldn't always obtain the card he wanted to draw, as shown when he drew "Fake Trap" while his opponent controlled "Jinzo". He eventually came to the conclusion that the answer to the "art of drawing" lay in nature, so he lived in the jungle to perfect his drawing technique. This, alongside survival training, gave him a wild-like appearance, clothed only what is left of the bottom half of his uniform. His survival training also left him extremely muscular.
Damon returns during the second year as one of the few Obelisk Blue students left untouched by the Society of Light. Retaining his wild appearance, he participates in one Duel of the Genex Tournament against Mathmatica and defeats him.
Damon's character is based on Tarzan. In the English dub, Damon replaces the word "I" with "me" when referring to himself, to further the Tarzan homage.
In Yu-Gi-Oh! GX Duel Academy, Damon is an available opponent while you are in Obelisk Blue. He uses a draw Deck and triggers an event of the game. In this game, he has his young appearance.