Azazel

Azazel is the leader of the fallen angels. He is very laid back and relaxed. He also likes to play a lot of jokes (Such as hiring issei to do simple stuff like playing video games with him for a reward like gold bars or jewels). He met up with the leaders of the Devils and Angels in novel 4 to form a truce. He has lost his left ahd due to Katreya when they fought as Katreya made indestructable tentacles that wrapped Azazel's left hand claiming that they will explode but Azazel nonchalantly cuts off his own left hand.