The Singing Mercenaries
Zaziel is one of the “angels” of Chaos, and, as identified Mark 9, by a lieutenant to the God of Chaos. Zaziel has appeared before the Singing Mercenaries twice, once during their trek through the mountain pass (see The Mountain Pass), and again at the hidden shrine to Bahamut just before their titanic fight on the back of Ahmidarius with an undead dragon and its mysterious rider.
Zaziel has exhibited the power to telekinetically hurl a full-sized humanoid a distance of 200 feet, and can fire the same black bolts of chaos energy that Azrael displayed during his fight with the the Singing Mercenaries.
Zaziel has a history with Ahmidarius, as the two recognized each other and conversed during their encounter in the Temple of Bahamut, although the exact nature of their relationship is unknown.