................ Since this series already give Toaru vibes since beginning, I don't find it surprising. Also, angel is not that uncommon for supernatural story like this one (the pervious one included saint and god-slayer, so why not angel now?).
............ That princess seems to know quite a lot about Kojou (or maybe about Avrora) and Yukina/Lion King. Wonder why is that... And the 2nd death for our 4th Progenitor. (yay?)
EDIT:
Eps12:
.................. Yay, 3 down, 9 more to go (reserve 2 for Asagi and Natsuki-sensei). And dayum, that princess!!