Student at Hawkins High School. Best friends with Mike, Eleven, Lucas, Will, Max, Eddie and Steve. A typical "nerd", and has a rare genetic disorder (cleidocranial dysplasia) that prevented his teeth from developing properly, making him a prime target for bullies. Son of Claudia Henderson. He also is a member of Eddie’s club Hellfire Club where they gather to play D&D. Outgoing, energetic, and often brings humor to tense situations. 