Sheridan
A sliiiightly psychopathic but fairly loyal friend and partner. You'd want him around during the apocalypse, but maybe not so much while society is still limping along. It's easy to miss, because he's awful and no one in this comic engages in much PDA, but both Moose and Mandibles are dating Sheridan. (Look, everyone makes bad decisions sometimes.)
Moose
Moose loves cars and karaoke and even though he is somehow(?!) partnered with Sheridan, he probably wouldn't help anyone dispose of a body because he's closer to lawful good. If they find a place with a garage, he will probably build an apartment there because he's much more comfortable surrounded by broken machines than even the best-working of humans.
Mandibles
Mandibles has very simple needs: she just wants a pet-friendly place that has room for the men she bosses around and their stupid hobbies. She's normally well-mannered, but if Sheridan isn't around to be horrible, well, they say power fills a vacuum. The burden of being right 99% of the time is one she is able to bear only with occasional breaks to scroll through Insta, enjoying sad poetry and photos of celebrities in wet clothes.
Stub
Stub is the nesting partner of Mandibles (but not Handibles) and his next greatest love on this blue planet of Earth is good food. Or even mediocre food, really, if it's got the right spices. He's excellent at handling crabby humans, but not so good with monsters, ghosts, and anthropodermic bibliopegy.