It's vulgarity *is* extreme. That's because its life, and the restraints it has suffered, have been even more extraordinarily extreme. In a bad way. Imagine being sentient, quite intelligent, but having no hands, no body, being only able to observe. And all you *can* observe, for 364 days a year, is the inside of the headmaster's office. You'd probably go bonkers. And, when you're finally released - allowed to go out into the world - you'd go overboard in trying to handle it all. I think the Hat's character is a mix of several things - he's got a superiority complex the size of the moon - but that's understandable - he's lived a thousand years, seen we puny mortals come and go, seen us make the same mistakes over and over again. He's spent a couple of hundred years (I think that was the number) being locked up even more than usual. I think 'restrained' is exactly what the Hat wouldn't be, at the start of this story, when he's finally allowed out of his prison. Or his prisons, plural - first, he's out of the office, can see the world. And then HJ gives him a body. Do you think the Hat had calmed down a bit by the end of the story? He'd adjusted somewhat, I thought. Even to the idea that he had to 'share' Harry . And put up with Fawkes. And actually participate, pick a side, in the war. Finally get involved rather than sitting back and snarking at everyone. Well, the James of canon was something of an arrogant arse in his school days; we're told that he wised up in his last year and Lily rewarded him with her affections. He probably loathes himself to some extent; and thus his fellow conspirators. I don't think he 'loathes' Harry's contemporary peers. Not until they've given him reason to do so, by their actions (Angelina, the twins). By default he treats them well, although wary of their youthful mindsets. No, there is a reason. It's because Fred and George find themselves *beaten*. In canon they are never 'defeated' - certainly not by their peers. Their pranks against their mates succeed with no resistance. And then, in this story, HJ smacks them down. Again and again. And each time the twins respond, incrementally upping the ante. The twins couldn't handle 'defeat'. It's a perfectly reasonable fanfic extrapolation of what might have lurked in their canon characterisation. We never saw it because they always got away with it in Rowling's books.