Minor suggestion. Remove the 'the' in front of the enemies' names in battle! It's slightly frustrating that there's a good chunk of unique enemies you can fight (the angels and demons in October, for example) and their name is treated as if it's a type of animal (The Aiatar, for example). It reads as really clunky.
I think 'the' should be omitted entirely from the text in battle! Then it reads better for unique enemies, and it won't make anything read as awkward with generic animal NPCs. Instead of "The Lion pounds you for x damage" it would read "Lion pounds you for x damage" etc.