Magician

A Magician is a person who is trained to use magic. A 'normal' person can also use magic, as Tsukuyomi Komoe demonstrated in the 1st story arc of the anime and the 1st Light novel, though a normal person will suffer more severe consequences than a magician if they fail.

Western magicians crave their sorcery name onto their souls. Their sorcery name is normally the reason they took up magic, or the essence of who they are. An exception are Saints, who may carve it onto their chest/heart instead, as shown by William Orville. Stiyl Magnus once said the real reason for having sorcery names is long forgotten, now it is only used in battle as a gesture to say 'it will now be a fight to the death'.

Other magicians (like the Etzali of the Aztecs) might not follow the Western rule of sorcery names.