In the quiet, haunted town of Hawkins, Indiana, monsters do not just crawl out of the Upside Down. Sometimes they walk in through the front door wearing cologne and lipstick, leaving suitcases in the hallway and lies on the kitchen table.
Lilly Harrington is eight years younger than her brother Steve, blue eyed like their mother, stubborn like no one wants to admit, and practically raised by the boy everyone thinks is only good for hair and attitude. While their parents vanish into business trips and affairs, Steve becomes more than a brother. He is the one who packs Lilly's school lunches, brushes tangles out of her blonde hair, and tucks her bunny into her arms at night.
On the surface Lilly is just a child who loves Alice in Wonderland, unicorns, rainbows, and loud music. She trails after her best friend Erica Sinclair, trading secrets and sarcasm, inventing worlds where girls like them are never powerless. Yet the stranger things stirring underneath Hawkins do not care how young she is. As shadows thicken and a portal tears open between worlds, Lilly is pulled from the safety of the background into the very center of the fight.
Across four terrifying years, from 1983 to 1986, Lilly's journey threads through the familiar events of Hawkins, but always from the small, often ignored corner of the room. At eight years old in Season 1, she appears at the edges of the story, all big eyes and rabbit plushie clenched in her fist. She sees more than anyone realizes. She hears the late night arguments behind closed doors, the phone calls that end in silence, the way Steve's voice gets rougher when he tries to sound like a parent and not a scared teenager.
In Season 2, at nine years old, everything changes. When Steve goes to Nancy's house to apologize, Lilly is dragged along as just another responsibility. By the end of that night, she is not just a little sister any more. Drawn into the war against Demogorgons and demo-dogs, Lilly stumbles into tunnels beneath...