Edo Phoenix is a child prodigy, world famous, top-ranking professional duelist. He is adored by fans around the globe, and his celebrity status has done wonders for the game by introducing it to the masses. An intelligent vigilante, Edo makes his first appearance in the second season of Yu-Gi-Oh! GX and is the anti-hero counterpart to Juudai. Though not initially caring much for Juudai and Duel Academy, Edo is sent there by his manager to defeat Juudai, succeeding in doing so. It is only after a furious Duel between Heroes and realizing that he was being deceived that Edo comes to better terms with Juudai. Edo is stated by Pegasus J. Crawford, the creator of Duel Monsters as one of the best Duelists he has ever seen, listing him along with Yuugi Mutou, the previous King of Games and Seto Kaiba. He is also a pro-athlete, and excels at skiing, skydiving, skysurfing, and surfing. While no mention of it is made in the English dub, the original version further indicates that he has a Ph.D. in two undisclosed subjects. Edo can also see Duel Monster Spirits, although not to the same degree as Juudai. Edo is one of only three people to ever defeat Juudai.
An alternate universe version of Edo appears in Yu-Gi-Oh! ARC-V.