There are a few spelling errors and problems with awkward wording.
"starred" in the first paragraph should be "stared".
"revirberated" should be "reverberated".
"unseen sight" doesn't really make sense, as Kairi has clearly seen the sight. You probably mean how the boys can't see her, but the phrase just doesn't make much sense.
There were other small things like this throughout the story, so you may want to look it over once more.