After the assembly, I head to my room to grab my bag for class. But as I get to the top of the stairs and glance down the hall, I realize my door is ajar. What the…? I push it wide. Inside is a girl with long, dark hair up in a giant topknot. She has on Beats headphones, and she’s brought a backpack and a single trunk that’s wedged at the end of the second bed that’s been untouched since I moved in yesterday. “Hey,” I volunteer. “I’m Emily. I guess we’re roommates.” The girl doesn’t answer or take off her headphones but reaches for an earpiece to touch...