You could make the same argument for the base modrons, but nevertheless, they have a LN alignment. I know some stories have a mindless Golem, others have onefalling in love, or getting out of control, which seems like sentience to me.
Charon, and various personifications of death, might apply here. Doing your duty, death comes for all, no arguing your way out of it or bribing death, etc. “You want over this river? Two coins. You don’t have two coins? Go away and come back when you’ve got two coins.”