Lydia is a character in the Dark Visions trilogy. She is the daughter of Mr.Zetes and first meets the gang after giving them a ride when their car breaks down.

Lydia Zetes is the eighteen-year-old daughter of Mr. Zetes. She is sent as a spy into Kait's group in The Possessed and eventually joins, then betrays the group. She is timid and afraid of her father and the dark psychics, but eventually helps Kait in the end.

It's wasn't a young woman, Kaitlyn realized. It was a girl. A girl about