Sebastian turned his head towards the sound of Dennis' voice, looking down at where he knew the boy was hidden.
"Ginny Weasley spoke to the headmistress," he said. That wasn't a lie. "I'm going to be teaching Muggle Studies," he continued, wondering how he was supposed to persuade Dennis to come out. "You're muggleborn too, aren't you? I know how difficult it is to- to not have anyone-"
Punters were still looking at him with curiosity, wondering who he was talking to, why he was starting to get quite involved. "If you come back with me- I'm your head of house now, too-"