You know, the best thing you guys could do at this point is to probably just... ignore him.
I hear it works with puppies.
If you ignore them when they're naughty, they stop because it does nothing for them.
On the other hand, praising them for good behavior works wonders, as they'll always perform to your expectations in hopes of getting that praise, even though it's not garanteed.
It's like when you find coins in the change receptacle for a public phone booth. You haven't found any since, but you keep checking anyways in hopes of getting that reward. And that's what I'm getting at.
Reinforce positive behavior and ignore the negative.
I'm positive it'll work.
Because well, let's be honest. You've all (myself included) been admonishing Hiryu and trying to steer him down the right path for over a year now, but he's still an egotistical idiot. He's still an idiot because he loves the attention, even if it's negative attention. So maybe Hiryu just needs to be treated like a puppy.
Y'know. Without the cuddling.
And the AWWWE'ing.