Cynthia is a character in the first season of Stranger Things. She is the current girlfriend of Lonnie Byers, and only appears in The Weirdo on Maple Street. Her voice is heard in The Vanishing of Will Byers.
Following the disappearance of Joyce and Lonnie's youngest son Will, Hopper advised Joyce to call Lonnie, as missing children are often found with a family member or relative. However, when Joyce called, Cynthia picked up instead.
Lonnie's older son Jonathan later drove out to Lonnie's place to look for Will. Cynthia had a brief interaction with Jon, opening the door for him.
|Season One appearances|
|The Vanishing of Will Byers*||The Weirdo on Maple Street|