No short story I'm afraid; I'll have to earn the spec points some other way. But here's my thought process:
Nick the character is charismatic, I shoot people gifs, they probably think I am too. I told two people slightly different things on the alliance front (Pikachu saying that the alliance was my idea, me saying it was his) so Devious fits, and Nick the character is that at times too. I beasted the challenge so I make the most sense as the Muscle.
Pikachu sent me a picture of his lego and sent that to other people too, so Artistic fits.
Rust is a force to behold when it comes to game and the most obvious strategist on the tribe, and I think he knows that. Courageous, Bossy, Commissioned the heist works best with that in mind.
Kate is something of a gamebot and clearly the least social on the tribe, and all the other pluses are social, so Reliable is the only one that fits. She seems like she'd be quick to anger so bad-tempered also fits there. Out of everyone on the tribe, she's also the most obviously going to put The Brains as her role, because she's a lot more strategy focused than social focused.
Affectionate and Joyful were what I had left in the first column. Chase is good on the game front, Penelope is exclusively social, so Affectionate seemed to fit her better and Joyful him. The Inside Man also works best for a purely social player because that's the person who has to be talking to people.
I pretty much randomised the remaining options, because there wasn't anything that massively stood out to me on any of them. I'm glad we scored as high as we did.