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Mrs. Sinclair is the wife of Mr. Sinclair, and the mother of Lucas Sinclair and Erica Sinclair.


Season One

Mrs. Sinclair, along with her husband and Lucas, attended Will's funeral.


Season One appearances
The Vanishing of Will Byers The Weirdo on Maple Street Holly, Jolly The Body
The Flea and the Acrobat The Monster The Bathtub The Upside Down
Season Two appearances
MADMAX Trick or Treat, Freak The Pollywog
Will the Wise Dig Dug The Spy
The Lost Sister The Mind Flayer The Gate