Spider Demo was a normal tarantula until he was bitten by a radioactive Demoman. He is a now humanoid spider who wears a rubber mask and clothing that makes him look like a demoman but with a spider theme. He can vomit webs and control them if he has drank enough alcohol. He loves to cocoon anyone he thinks is cute. He also likes to cuddle with anyone that he has cocooned. His rage causes a web explosion above him which he is unaffected by.