Sergeant Greasemixer, real name Jacob, is a YouTube content creator and friend of the show.
Jacob's content roughly resembles the answer to the question, "What if Filthy Frank was a fat Jewish man with daddy issues?"
Greasemixer has a Twitter account parodying Pyrocynical. He pretended to be Niall himself when the show accidentally DMed him attempting to contact Pyrocynical, leading to a joke on the Discord server that he was going to appear on the show. Lars quickly caught on to the ruse, admitted it was funny, and made friends with Greasemixer.
Joe would go on to collaborate with Greasemixer on his debut rap album.