Smokes a drifter but he wasn't always that way. At one time, he had a wife and children. They lived in a nice, safe settlement... until the raiders came and wiped it all away. After losing everything, he contents himself with survival, staying on the move. Experience has taught him that sticking around in one place too long means you're there when it all goes south.
Smokes is an honorable man. Guarded but kind. He values his reputation as a honest man. After his own losses, he sees life as precious. Hence, he abhors violence, instead preferring to resolve conflict through dialogue and negotiation. But he also knows that cruel, unreasonable, violent men can, at times, not be dealt with rationally.
Hence, the pack of cigarettes he carries with him everywhere he goes. Smokes doesn't smoke as a habit. But when evil men give him no choice but to violently take life, he smokes a cigarette, perhaps to recognize the loss of life, perhaps as some small self-imposed punishment. There were twenty cigarettes in that pack when he found it. There are now fifteen. Smokes hopes that's the way it stays.