Moxxie Knolastname is an assassin at I.M.P, Millie's husband and one of the main protagonists of Helluva Boss. He is the straight man weapons expert of the I.M.P gang who tends to be the most rational of the group, but is often treated as the butt of the joke. Moxxie is an imp with red skin and white freckles on his cheeks. His white pointy hair leads up to his curvy black and white striped horns. He also has yellow sclera with black slit pupils. Moxxie has a long red thin tail with a quadrilateral barb at the end, as well as lanky digitigrade legs ending in what appears to be cloven red hooves, reminiscent of artiodactyls. Moxxie's usual outfit consists of a navy-black coat with red buttons and white cuffs, black pants a white shirt that has a black turtleneck, a large red bow-tie, and fingerless gloves. Moxxie is the I.M.P's weapon specialist; and as such, has a vast knowledge of weapons and often brings a variety of them along during jobs. He is often the most vocal and realistic of the employees regarding the company as a whole despite its dysfunctional environment and is bullied consequently. He is also shown to be insured about himself since he’s not physically strong since Striker, Lin and Joe was giving him a hard time since they believe physical strength is what makes a person strong. Moreover, he is an imp who is easily annoyed and rather clumsy, as he trips over their ritualistic book on the way through the portal to the living world. Despite being a murder-for-hire imp, it seems Moxxie is queasy with unnecessary killing beyond their targets. He also is uncomfortable with the idea of killing targets who have families, and attempts to give people second chances, as seen in "Murder Family". Moxxie is also shown to have a comical side, as when he talks about killing an entire family, he claims it might be alright if it was just a shitty dad or a mob family, saying "That's understandable" in an accent.

Moxxie:sitting in his chair cleaning his pistol