Riku had been heading out back to check to see if there was anything he could practice his keyblade on. After all, even he understood that he probably shouldn't actually destroy any of the training equipment in the gym, but he also knew that he needed to train, it had been a few years since he'd needed to use his keyblade regularly and he was not the kind of person that would be okay with not being at the top of his game should he need to use it again while in Lawrence.
But when he went outside he found that someone else was already there, clearly practicing something of her own. "Working some magic, huh?" he said, brow perked after watching her for a minute. Really, he didn't see what good changing the color of something could be on the field, but if she could figure out a use for turning someone blue-green then hey, more power to her. "Man, it seems like half the people around here do magic. It's rare in all the worlds I've been to."