Hm, Daniel Saddler, in a post apocalyptic game that had 40's level tech and magic. Daniel happened to be born with one of those gene defects that meant he couldn't feel pain. This ended up with him becoming a serial killer who was banished from his village for torturing people to death, and forced to wander, doing odd jobs. Said torture was experiments with unwilling subjects to understand the human body, what it was capable, and what the concept of 'pain' was. He then took it into biological sciences to make drugs and stuff.

Otherwise a very cultured individual, if it weren't for the kidnapping, brutal experiments, and desire to make the next stage of humanity with 'ends justify the means' logic.