I'm pondering this as I'm writing because they have different ambitions, different perspectives yet to me somehow they feel the same. It's not the way they act, but rather when they're there on scene they just feel like a collective rather than individuals to me. Which they shouldn't because: A) Owes life debt to B, averse to killing, has his own ideas of right and wrong which gradually become warped under B. B.) Not so much sociopathic as rather understands what he needs to do to stay alive and feels no remorse about what he does, has a rather negative mindset. Gradually influences A throughout the course of the novel til a certain point. C.) In a way she's very nihilistic, the whole point of the journey to her is to find a sense of purpose or at least some affirmation of her existence. The only possible reason I can think of is that they're all jaded/pessimistic in their own ways, yet this negativity kind of resides in all of them which might be how they feel the same? Because when I'm writing them, I'm writing them from the same mindset perhaps even if their own motives/personalities are different?