Azriel

Azriel is an integral member of Rhysand's Inner Circle within the Night Court. He serves as Rhysand's spymaster, a role he excels at due to his shadowsinger abilities. Along with Rhys and Cassian, Azriel is one of the few Illyrian warriors to hold the rank of Carynthian. 

He is described as classically beautiful, with an elegant face, dark hair, and hazel eyes, and is constantly surrounded by shadows. He has membranous wings akin to a bat and bears the tattoos of an Illyrian warrior on his chest and back. His hands are scarred from burns he received when he was a child. He wears seven blue siphons to help channel his power and wields a knife called Truth Teller.

Azriel first appears in A Court of Mist and Fury.