Gregor does not like it when the other Sinners make jokes at his expense about his verminous arm or general relation to bugs, yet doesn't stand up for himself much, or correct their behavior in a way that keeps them from doing it again. Still, he gives them more attitude for it than he does to those mistreating him in more serious situations. Gregor's tendency to react more outspokenly to things that bother him on a surface level yet go quiet when it comes to those that affect him deeply.