I didn't know Zero Vanitas could possess people, but I guess she still is an evil god with a lot of cards beneath her sleeve. I just wish she acted more like she knows she has more cards.
Lucifer as a fallen angel isn't really a figure in the bible either. The verse where his idea came to be (Isaiah 14:12) is directed to a king of Babylon who tried to put his own throne above God's, but finally fell to the ground. Ref.: Wikipedia: Lucifer
More or less, yes. He first avoided meeting kings because it was troublesome, so he went to the north for a little adventure where they met Luna. Luna guided them to the underground dungeon where they fought an evil god who became his servant. From there they got a bit distracted turning the...
And yet, the quality of the manga and some of the plots make it feel like a good story, so when it dips back into not taking itself seriously we feel betrayed. It's the feeling I got.