V5 P1, 30%
"Reina was dextrous, so she could do anything, but she had said that Zelos was bad at it."
Seems both dextrous and dexterous are valid spellings, but with the latter being more common thought I'd make a note just in case.
While I'm noting things:
45% “This island is relatively untouched by human hands, and yet there are surprisingly many artificial things here.”
Seems a little definitive for someone with amnesia. Perhaps is -> seems (unless this happens to be a slip/foreshadowing and she knows more than she's letting on, or her subconscious coming through)
64%
"The three of them had apparently gotten stronger lately and could beat some monsters now, but when their enemies got to the rank of rabbits, they still struggled unless they were ready to sacrifice themselves to take down their foes."
This could well be me being dense, or just simply forgetting previous events, but what on earth is 'the rank of rabbits'?