Oh, I just realized I forgot one of my actual favorite NPs because it's an enemy one.
LB5 spoilers:
Grand Order: Anima Animusphere - Kirschtaria (specifically the invocation he uses in Atlantis)
put that on the list in the top 3 for sure, could even be #1.
May you find your book in this place.
Formerly known as xp1337.