Here is Sora, the main protagonist of Kingdom Hearts. Of the figures on the left, I have Kairi and Roxas. Apparently figure No. 4, Axel, is the one that really took off from this set, and is now hard to find for anything less than exorbitant sums. I never really bothered with him because in the game I found him to be something of an axe-hole.
If Square-Enix is listening, the next series of this line should include Riku, Namine, and Diz. I would say Donald, Goofy, and Mickey, but I think they are concentrating on the more human game figures, and ones that won't involve complicated copyright deals.