Journal posts aside, Roger didn't really know this Gryffindor lot all that well. Sure, he had played against most of them during his time at Hogwarts, but they didn't exactly spend the time together off the Pitch getting to know one another back in school. They were good acquaintances at best, though out of them all, he knew Angelina the best.
Having been captains of their respective teams, they had spent quite a lot of time talking. Mostly, it had been to talk Quidditch and some friendly trash talking, but the past few journal posts had really opened his eyes to exactly how Johnson behaved.
And he didn't mind it in the least. The journals were a bloody brilliant idea and he was sure he wouldn't have been here if it hadn't been for them. It was because of them, after all, that he was talking to people he wouldn't have normally spoken to otherwise.
The party was well underway by the time he had arrived. Picking up just a soda for the moment, he wandered away from the snack table to give himself a tour of the open areas of the place. He kinda wanted to see this ghost of theirs.