One of the good things - and there were few - about Gilderoy Lockhart was that he didn't care at all whether Barty was actually paying attention to him or not when they sat together. He would go on about nothing much - so, himself - either way and Barty had time to think, to watch others, while passing as someone having a normal conversation. It worked well enough, although he knew he'd still get fed up after a while.

His eyes finally focused on Gilderoy again after a minute and he paid actual attention to his words, raising his eyebrows. What even.