Erica Sinclair is a minor character in the second season of Stranger Things, and will be a recurring character in the third season. She is the sister of Lucas Sinclair and the daughter of Mr. and Mrs. Sinclair.



On the morning of October 31, Erica watched as Mrs. Sinclair photographed Lucas in his Ghostbusters costume. She taunted him, calling him a “nerd”.

Erica was having breakfast with the rest of her family when Lucas asked their father for advice. Later, when Dustin was trying to contact his friends to warn them about Dart, Erica, who had sneaked into Lucas's room, was the only one to answer him. Dustin tried to explain to her the severity of the situation, however Erica didn't listen and turned the radio off.

The next day, Erica was playing in her room when Lucas came to retrieve his toy she had taken from him. It was then that she finally revealed to Lucas that Dustin had been trying to contact him.

On the night of the Snow Ball, Erica again made fun of Lucas after she witnessed him talking in front of his mirror, practicing how to ask Max to dance.


Erica is the somewhat typical annoying little sister to Lucas and a source of irritation to him. She constantly calls him weird and annoying and isn't fond of Lucas' friends by extent, barely showing any respect to them. It's also implied she sneaks into his room and steals his stuff, such as Lucas' He-Man action figure.


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

Family Tree

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Mr. Sinclair
Mrs. Sinclair Family Tree icon 002
Mrs. Sinclair
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Lucas Sinclair
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Erica Sinclair