Reed is a Spider Centaur from the Unlit lands.  

He came to Thark seeking to become a mage, and is apprenticed to Master Vastar.

His best friend is Lushia - who is not afraid of his spidery appearance.  

Spider Centaurs come to sentience through music and song.  Inside of the song of their birth is the fact that they are afraid of the Black Zintriny (and most of al Gurth).  They must accept slavery from any Black Zintriny who claims them.  Reed is owned by Bone - Gurth's son.