Gonzalez
Sonny, I Watched the Vault Bein' Built!
I should probably clarify. While Gonzalez is the "nicest" one on the team, it doesn't mean he will greet any stranger he comes across with open arms. Besides, on his mind, stealing supplies and sneaking out on a mission for the sake of personal benefit feels wrong enough already, and this makes him kind of paranoid (karma says: if you do bad things bad things come your way). You will probably have to earn his loyalty before he starts acting friendly and making jokes like everyone is an old friend.