Y/n is familiar with what happened to will in the upside down and she was there in season2 she has fought with them so they are all pretty close friends,this is an enemies to lovers story so its pretty much a slow burn ,she is in the same year as Eddie,and y/n has PTSD because her brother died trying to save y/ns life.

Spencer and y/n's life together is going perfectly. Both are happy, healthy, and they have plans for the future. But when an old foe causes everything to go off the rails, nothing is normal anymore. Will love help overcome, or can some things not be saved? {Spencer Reid x Reader} The SEQUEL to "Ethereal"

You've spent most of your adult life convincing yourself that love is not meant for you. Your job and social awkwardness made it hard to find- and the right guy just never shows up. But when you revisit your college and it's memories, you meet someone who just might be worth it. {Spencer Reid x Reader} Based on Season 13 Reid. It's pronounced (eh- thee- ree- ul) by the way.