Background Character in a HP Mary Sue Fanfic

One moment I'm a college student, the next I'm trapped inside a Harry Potter fanfiction—as a nameless extra. While the Mary Sue protagonist collects her harem, I'm just trying to survive Hogwarts with my sanity intact. My goal? Keep my head down, avoid the plot, and live a peaceful slice-of-life existence. But when mysterious forces stir in the shadows and everyone keeps dragging me into their drama, staying invisible becomes harder than expected. Sorry, main characters—I'm taking the cozy route.