I was going to mention Shiv as a potential clam. (And he LIKES clams!) With the background he came from, expressing an emotion would reveal a weakness a potential enemy can use against you. (And the only emotions Big Mean Tough Villains are allowed to express are anger, lust, or pride that his favorite sportsball team has just scored a point. And it's no wonder Shiv has a hair-trigger; that appears to be common in men who've been in prison.
Re: Yes ...