Percy waited for her to leave, before taking his wand out. He didn't care out weak he was, but he needed to do this. He'd learnt long ago never to fall asleep unless the door was warded and no one could come inside. It was the only way to make sure you didn't turn into different colours or whatever else the twins could come up with. He had no intention of falling asleep in this place while there were people who could come in the room. No, as soon as Bones left with the message, he cast the spells so not even the Healers could come in.
"Now, we can possibly go to sleep," he said, feeling even more tired now that he had used so much energy casting magic, and if anyone tried to come in- He smirked at the possibility, before concentrating on the present. "Night," he said, "and thank you."