Gregor's whole shtick is that he's a depressed sack of shit that's stuck in his way.
>Sinners can choose to engrave something on their weapons
>Gregor chooses to tat "Vermin" on his human arm
miserable pile of self-hatred who can't change anything about it as he'll be stuck with the arm until the end of time unless LC provides a way to deal with it
and I love bug guy for it.