Wow. Great story. Although Sora does seem kinda like an OC in the first few chapters.

OHHHHHHH YESSSSS! CAN'T WAIT FOR THE SEQUEL! (take your time though, I'd rather wait and get something excellent than have you rush it for less quality)

Please make more chapters. I want to read more of this fantastic story

I love this story, and I can't wait to see what the next chapters will bring!

Aika's background keeps getting more and more confusing, and I love it because I know that once everything is revealed it'll all make sense and I'll be like 'OHHHHH SO THAT'S WHAT HAPPENED'.

This looks like it's off to a good start. I like the fact that you gave a physical description of Aika before the story proper, and that Aika seems to be well-integrated into the Kingdom Hearts universe so far, between her friendships with the Destiny Islands trio and her implied brother. I can't wait to see where this story goes!