Louis Weasley (and Minerva McGonagall?)
To be honest Louis wasn't entirely sure what the situation was; he'd only heard bits and pieces from other people and had simply drawn his own conclusions - without seeking out any confirmation from the subjects of the information. Whatever the case might be, as long as his mum was happy it was fine with him.
"Thanks again for the invite," he said. "Never could say no to free food anyway, just ask Vic and Nikki.