Okay so Ro is now 15 years old. She is not friends with Mike and Dustin anymore (I'll explain that later).
She use to join the hellfire club, but she quit a week after Will and El left Hawkins. She is also dating Patrick McKinney (I just wanna make one thing clear that I DO NOT like freshman senior relationships, please DO NOT GET IN A FRESHMAN SENIOR RELATIONSHIP)
And instead of him being 18, he's gonna be 17 in the story.
She also have a whole different look when they started dating, and sometimes hangs out with the popular kids, including Lucas. (All of this will be explained later)
This is what her hair looks like in this season