In Season 2 of Stranger Things, Will Byers struggles with lingering trauma from the Upside Down. He experiences terrifying visions ("true sight") of a giant shadow monster, the Mind Flayer. The entity eventually possesses his body, turning him into an unwitting spy for the hive mind before Joyce and Hopper burn the virus out of him and is 13 years old in hawkins middle school.

In season 2 of Stranger Things, Lucas Sinclair balances his trademark pragmatic realism with newfound vulnerability, showing a more open, romantic, and communicative side as he pursues Max Mayfield and helps his friends fight off new threats from the Upside Down 13 years old and African-American

In season 2, Eleven's personality evolves from a traumatized, dependent child into a rebellious, searching teenager. She displays stubbornness and frustration due to isolation, experiments with a tougher edge after meeting her "sister" Kali, and ultimately chooses love and belonging over anger and revenge 13 years old

In Season 2 of Stranger Things, Dustin Henderson balances his trademark curiosity, humor, and insecurity. Driven by a need to prove his worth, he makes a critical, misguided decision to hide a dangerous creature, while simultaneously forming his iconic, protective friendship with Steve Harrington 13 years old

In season 2 of Stranger Things, Mike Wheeler's personality shifts from an optimistic leader to a grieving, isolated, and defensive adolescent. Trapped by his longing for Eleven, he becomes short-tempered and resistant to change, yet he remains fiercely protective and loyal the moment his best friend Will needs him 13 years old