Amelda or Alister (4Kids dub) is one of Dartz's three main henchmen along with Rafael and Valon in the anime, Yu-Gi-Oh!. He only appeared in Season 4 (aside from 2 cameos in Season 5) and therefore only appeared in the anime.
He was voiced by Ted Lewis.
During the war, Alister's younger brother Mikey was killed (captured in the 4Kids dub) by Dartz (disguised as Gozaburo) and he joined Dartz from here (unaware that it was he and not Gozaburo who wronged him). His main target was Seto Kaiba, as he hated him because of what he thought Gozaburo did (despite the fact that Kaiba, though he is quite mean sometimes, is not like Gozaburo and had nothing to do with any crimes he was thought to have committed). He disguised himself as Pegasus J. Crawford and dueled Kaiba eventually revealing his true identity. The theme of his deck was fire. He used the Seal of Orichalcos so that the loser of the duel would lose their soul but both their life points went down to zero and neither duelist lost their soul.
Alister had his rematch with Kaiba on a plane, using an army deck but lost and the Orichalcos took his soul. From where he was, however, he heard Dartz say that he was the responsible for what happened with his brother shortly before Rafael lost his soul. He was released when The Great Leviathan was defeated and was seen in The Grand Championship arc.
He later had another cameo appearance in Season 5 while Pegasus was talking.