Mucas

Sadie Sink (born April 16, 2002) is an American actress. She portrays Maxine "Max" Mayfield in Netflix’s Stranger Things and has also appeared in Blue Bloods and The Americans. Sink has also worked on Broadway, with credits including Annie and The Audience.

Caleb Reginald McLaughlin (born October 13, 2001) is an American actor. He is known for playing Lucas Sinclair in the Netflix series Stranger Things for which he has won the Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Drama Series. He has previously performed on the Broadway stage as Young Simba in the musical The Lion King. McLaughlin made his feature film debut in 2020 starring in Concrete Cowboy.

Maxine "Max" Mayfield (portrayed by Sadie Sink) is Billy's younger sister, an avid skateboarder, and the tomboy of the group who catches the attention of Lucas when it becomes known that she has the highest score in Dig Dug. While she never played Dungeons and Dragons, she calls herself the "zoomer" of the party, despite Mike's insistence that the term is made-up. She claims that the role of the "zoomer" is to transport the group from place to place. In the second season, while she is driving a car very proficiently, she says to Mike, "See? Zoomer." Max is shown to dislike her step-brother Billy Hargrove, for his hubristic and arrogant behaviour. In season three, she and Lucas are dating. Eleven approaches her to seek advice when she suspects that Mike is lying to her and Max convinces her that Mike might have done that to play along with his friends. Max helps Eleven in exploring the outside world, making them close friends. She is also shown to be a fan of Wonder Woman.

Lucas Charles Sinclair (portrayed by Caleb McLaughlin) is a friend of Mike, Will and Dustin, and older brother to Erica. Lucas is initially wary of Eleven, yet befriends her later on. In Season Two, he becomes a love interest for Max. In their Dungeons and Dragons party, Lucas is the ranger. He is very skilled with the use of a slingshot, which the party calls "The Wrist Rocket"; in the first two seasons, the slingshot is used for comedic effect as a hopeless last-minute defense, but in the third season, is used to actually save the team from danger.