It's surprisingly hard to find good Kingdom Hearts cosplay. I mean, people really suck at it, I looked a lot, but only found a few good ones.
The cosplays of The armors are the best, really awesome. I plan to do it one day, but Aqua's... Here they are ~~>
Up to down: Vanitas, Terra's armor, Kairi, Anti-Sora, Another (more awesome) Terra Armor, Riku, Terra and Ventus, Cloud.
To the smartasses out there who will think " Cloud is from Final Fantasy, not KH, duh", his costume in this cosplay is his looks in Kingdom Hearts.