Gwydion

He is a slave boy in KQ III, where we find him in a home on top of a mountain. We do not know much about him, except that he works for Manannan, a wizard who has a cat who doesn't like Gwydion. Eventually, he learns different spells, turns Manannan into a cat and escapes. He gets captured by pirates, but is able to escape them also. Eventually he makes it to Daventry where he learns many interesting pieces about his past.