Harold was a camper on Total Drama Island as a member of the Screaming Gophers. He was also a cast member on Total Drama Action as a member of the Killer Grips. He later competed on Total Drama World Tour as a member of Team Victory.
A skinny, awkward-looking guy, Harold takes immense pride in his numerous "mad skills." Although he isn't much to look at and is often disrespected by many of the other contestants, including his own teammates, Harold is actually an incredibly resourceful young man of many talents and has won several challenges, both for himself and his various teams. Harold's geeky interests, his somewhat poor personal hygiene, and his know-it-all personality often make him an outcast among his fellow contestants and a perfect target for bully.