I'm not much into reading Kingdom Hearts fiction (it ... may have something to do with the fact I haven't actually finished the game, ahem), but ... when you had this posted on your primary archive on the advent calendar, I absolutely adored it-- and since I have the good opportunity now, I figured I would actually review.
I love your writing, period ... I could probably go read something from a fandom I'm not even into and still find myself interested by it, your writing just flows so naturally. But this-- I think it's one of the best characterizations of Riku I've ever run across-- and the last line is simply priceless.