Xelloss (Demon/Monster Boy)

Xelloss (ゼロス, Zerosu; English: also His Japanese voice actor is Akira Ishida, and his English voice actors are David Moo (Software Sculptors), Kurt Stoll (in Slayers Premium) and Michael Sinterniklaas (in Slayers Revolution and Slayers Evolution-R). Another name for him is Beast Priest.

Xelloss was created by Zelas during the Kōma War, which ended approximately 1013 years before Slayers TRY. Unlike other subordinates of Mazoku lords, Xelloss is the sole immediate servant of Zelas Metallium, and thus a great deal of his power went into his creation. Because of this, Xelloss is the most powerful of all the priests and generals of Ruby Eye Shabranigdu's subordinates.

In the Kōma War, Xelloss single-handedly killed thousands of golden dragons; he is feared and hated by them ever since. They refer to him as the Dragon Slayer, although he does not like this name, probably because it does not fit the "image" he wants others to see him as.

Xelloss's duty for a thousand years was to find stray copies of the Claire Bible and destroy them so that humans could not find an easy way to defeat Mazoku (with Zanaffar), or use the power of the Lord of Nightmare

Male. Black hair. Slim. Wizard clothes. Can transform into a giant black tornado.

A Mazoku (Japanese: 魔族まぞく Kanji translation: Evil Race or Demon Race.

Mazoku do not have a true physical form, but ones with enough power can project an image onto the physical plane to represent themselves. They also have a so-called beast form; a form that is closer, but mostly not equivalent to, their appearance in the astral side