The funniest gag would be if Percy and Oliver just both think the other one is totally chill…and it freaks Fred and George out so much. They can’t figure out what is going on.
Percy will be like, “sure, Oliver likes his Quidditch, but so does everyone else around here. He’s on the team, after all.” And the twins don’t even know how to respond to that. And then Oliver will be like, “Yeah, Percy’s always nice to have around when you’re in a pinch… kind of quiet, but I don’t mind that.” And NOW the twins are more confused than ever.
At first they think they must just not talk much to each other…but that doesn’t seem right. They live together AND have had classes together for years. And neither of them seems self-aware or subtle enough to have hidden their basic personalities for that long. So they go investigating one night, and sure enough, there’s Percy and Oliver in the dorm both being…completely themselves. Like Oliver is pacing and saying Quidditch moves to himself, and Percy keeps just randomly popping his head out of his book to loudly tell some tangentially related story about how his day has gone. What’s more, they both seem 100% comfortable with that arrangement.
And the twins almost don’t want to tell anyone else because it’s the single greatest thing they’ve ever seen.