Oh. Great. He's modifying his lines. But that was fair, Riku'd changed how he'd delivered his... Auditory Assault. But after "simple" was supplemented with comments about brain size, Riku glared at Sora. It was bad enough he had to be in this skit, and worse still that he had to have THIS part and wear THIS outfit.

And then there was Roxas's comment. What is? Well, that called for a demonstration. Riku took two casual (and upright) steps towards Roxas and reached back to get his tail tip, though it truthfully was simply a sheet...

With that, he took it by the end and by the middle, and with a single deft movement, suddenly towel-whipped Roxas, aiming for his stomach. THAT's what's going for evolution.