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Apparently, she didnt knew more than that, unfortunately. Still, I was glad that theory was somewhat confirmed. She said she knew about the "Luminous Kingdom" and the "Expanded World" from overhearing angels and cherubins in Heaven.
It seems that Heavenly Spirits just live everywhere, either serving these races or making up their entire world. She said she served angels in a huge castle where they armed and practiced fighting demons. Apparently angels are constantly training and dedicating themselves on protecting the mortal world from demons and anything related to them.
