Regulus turned around when he heard Sirius' voice gave him a small half-smile. "That's true enough, but I think it's too cold for any of them to be out. I'll take his complaints more seriously if it happens again though." Regulus put his notes away and moved his things off the bench to give Sirius room to sit. "I probably should have left him in the dorms, but I... well, he's confined there while I'm at class as it is, and I don't think they ever caught the person that killed Cam's cat." Apollo didn't seem too bothered with the cold, though, and Regulus planned on placing a warming charm on his robe for him to lay in later.
Regulus looked over what Sirius was wearing and made a bewildered face. "How are you not freezing in just that?" He was used to the, to him, weird clothes that Sirius always wore, but he couldn't understand not putting on a robe or at least a jumper over it. "It feels more like December out here than it does November. Of course I've been out here since I got out of class, so maybe it just feels that way to me." He didn't really mind it that much. He was still in his full school uniform and he always preferred cooler weather.
"I saw you at the ball. How upset was Evans?" Regulus hadn't actually realized that it was his brother until he was close by him and heard him speak. Then he noticed the masculine features the mask and wig didn't hide. "You did a good job, even I didn't recognize you at first. I'd been wondering why she was dancing with a girl dressed as Potter."