Vittorio

Vittorio's mother was unmarried, the child was a bastard-born. Nobody ever let him forget it. His life started rough, and only got harder as his mother got trouble just as much as the child. She could only protect him for so long; Then it was up to Vittorio to protect his mother, instead. Even growing up young, Vittorio got a lot of scars, and even developed a reputation as a dangerous person to cross - the gangs nearby did not enjoy the idea of tangling with the young boy due to the viciousness he fought with - and some whispered, the dark powers he called upon when enraged. He's killed a few full-grown men for mistreating his mother, and doesn't go down when stabbed, and from that has earned a certain level of respect in the poor part of town.

Perhaps a bit silly, but Vittorio exists because I noticed the berserk virtue doesn't say anything about being unable to use magic or similar; It just says you go into a rage, killing every enemy and then moving on to your friends if necessary. So Berserk magus apprentice! I also like the idea of him being small and tough, easily underestimated. His Blackmail has helped him survive to his current state despite factors against him (being small and angry and a bastard).

If expanding him to greater numbers, I suggest Life-Linked Spontaneous magic, and possibly Chaotic Magic. You could trade Small and Tough for Large and One Eyed(or Clumsy) if you prefer a more traditional berseker, and of course Faerie Blood(Bloodcap) could be an explanation as to his current state.