Yeah, I don't believe in elite fodder, so all powerful characters will have some sort of Backstory. Also, the demons names comefrpm what they believe is their greatest sin. Sam wanted his brother alivd, nit for his brother's sake, but for his own, ths why he's Avaritis, or Avarice. Jack believed that his lack if action to prevent Sam's pickpocketing is what caused everything, thus his name is Acedia, or Sloth.