Regulus barely glanced up from his book when approached. “I’m busy. What do you want?”

He wasn’t cold, per se, but he definitely wasn’t friendly. His dark hair was cut short, cleaner than Sirius’s. His uniform was ironed and perfect, not a crease out of place. He could put the entire Slytherin house to shame.

And yet, sitting in the Slytherin common room, it was easy for Regulus to sink back into the shadows. Become part of the decor. A piece of furniture among classmates.