Lucas’ sister Erica (Priah Ferguson) was a comedic bright spot of the Stranger Things 2, but her role was a small one; we know that she’s funny, very smart, and really loves maple syrup. But this season, we’re going to find out a little more about her — not the least of which is the fact that, apparently, the prospect of coming face-to-face with zombified townspeople and horrific, spider-looking monsters doesn’t freak her out in the least. In one lightning-quick shot, she’s seen commando-crawling through an air duct in full Die Hard mode, wearing a makeshift miner’s helmet (really just a bike helmet with a pair of flashlights duct taped to it).
She only appeared in four episodes of the second season, but in early 2018, it was reported that Ferguson had been promoted to recurring character status for season 3 — and if this shot is any indication, it looks like she’ll be joining her big brother and his friends in their unsupervised, highly dangerous monster-fighting activities. Indeed, the announcement of Ferguson’s promotion let slip the detail that Erica will discover some key aspect of the threat looming over Hawkins all on her own — not a bad step up from her season 2 turn as inconsequential (if extremely cute) comic relief.