I thank the Fairy Council for the clarifications!
-The jewel puzzle took me a bit to work out at start but then managed to solve it neatly as soon as I noticed that each room required a different number of gems, and then by the end I had more gems that were required for the last room so I could leave some behind, felt pretty nicely balanced to me.
-Yes, Angel spent most of her time as a pretty soldier of justice during this run. :P
-Achievements:
Story: All but the "maniac" difficulty and a hidden one.
Battle: All but the extermination missions and bestiary ones.
Exploration: Only "Pious", guess my Angel ended up quite religious.
Secrets: Only Artist.