The Apprentice is a Name that studies the mysteries of magic. The name is often seen in Praes, as a student of the Warlock. Both known Praesi holders of the Name have shown an extreme disinterest in matters unrelated to magic. It does not appear to imply a magical specialty, such as the Conjurer, only that the holder is a mage of uncommon power.
In Book 6, a new heroic Apprentice from Ashur appears, proving the Name isn't tied only to Praes, nor by default belonging to Villains.
Like Squire, Apprentice is a transitional "student" Name, for individuals clearly meant for magical greatness but not yet settled on a specific Role. It lasts only a few years at most before the holder finds their formative pivot and transitions again. Former Apprentices can become any of a wide variety of mage Names, such as Wizard, Warlock or Heirophant.
The holder has increased magical capacity allowing them to perform spells with greater power, as well as weave spells with greater accuracy. Notable accomplishments of previous holders are: have performed magical soul surgery, restrained Fae royalty and demons, and created pocket dimensions.