 His last name in Japanese translates to "Trouble all around".Arthur C. Eos (Shidō Akatsuki in the Japanese version), known as A.C. Eos, or simply "Ace" is a member of the Zero Satella Police and is partnered with the Wizard being known as Acid.Using the Ace Program, they are able to Wave Change to form Acid Ace, and are registered under Project TC as No.