At the start of Season 2, Lucas Sinclair is 13 years old.Look: He has grown noticeably taller, sports a short afro, and wears typical 1980s casual wear like striped polo shirts, corduroy jackets, and later, his iconic Winston Zeddemore Ghostbusters costume. Personality: While still analytical and pragmatic, he has transitioned from a harsh skeptic into a more open, protective, and emotionally honest friend who is eager to impress Max.

At the start of Season 2, Will Byers is 13 years old.Look: He has a classic 1980s brown bowl cut, a noticeably taller and leaner build, and wears layered plaid shirts, corduroy vests, or his Ghostbusters costume. Personality: He is gentle, quiet, and deeply creative, but now carries severe trauma, feeling isolated and fearful due to his lingering, terrifying visions of the Upside Down.

At the start of Season 2, Dustin Henderson is 13 years old.Look: He has curly brown hair, his signature multicolored trucker hat, and his front teeth have finally grown in. He typically wears graphic t-shirts and hoodies. Personality: He is enthusiastic, highly intelligent, and a scientific optimist, acting as the group's comedic mediator while hiding a massive crush on Max.

At the start of Season 2, Mike Wheeler is 13 years old.Look: He has a dark, shaggy mop of hair, a taller and lankier frame, and typically wears striped collared shirts, member's mark jackets, or his Ghostbusters uniform. Personality: He is moody, cynical, and deeply resentful of the world as he secretly grieves the loss of Eleven, making him fiercely resistant to letting anyone new—especially Max—into the group.

At the start of Season 2, Eleven is 13 years old.Look: She has curly, growing-out brown hair instead of her shaved head, wears oversized flannel shirts, overalls, and Hopper's cabin clothes, and often sports a fierce, intense stare. Personality: She is deeply lonely, fiercely protective, and easily jealous, experiencing intense cabin fever while hiding from the government and longing to reconnect with Mike.