Alister, known in Japan as Amelda, is one of the main antagonists in the Waking the Dragons (or Doma) story arc of the Yu-Gi-Oh! second series anime, which is known as Yu-Gi-Oh! Duel Monsters in Asia. Alister is voiced by Yukinara Iemura in the Japanese version and by Ted Lewis in the English dub. He does not exist in the manga. His dub name was based on Aleister Crowley, the British occultist who created the Unicursal Hexagram, the symbol used for The Seal of Orichalcos. The obscurity of this fact is most likely what helped it slip past the censors.

Alister often quarrels with Valon over whose target is stronger. Alister also bought over half of Seto Kaiba's company, but it's unclear whether he used Pegasus's money or money from the Paradius corporation.