You could have the disturbingly upbeat person, like a Moira Brown (Craterside Supply, Fallout 3) who is an endless mystery in how one can be so chipper living in a crater in the ground? Everything is just a stream of happy coincidences while they are blissfully unaware of any evil machinations from large corporations, skating through their life until they wind up on the train to Anchorage because she got lost and took a nap in the wrong cart. 

...or  just go angst. I hear Red Star has a thing for shooting children's puppies. Go with that.