I think that we as the player will get to determine how evil we want to be in the game. Our choice of race and background might give us more options in how we approach a situation but one of the joys of mortality is free will, we choose what we want to do. Obviously we might be 'encouraged' by our new best friend the tadpole but it's ultimately up to us how evil we want to be and whether we want to justify it to ourselves or anyone else.
