Cassian

Cassian is a member of Rhysand's Inner Circle and serves as the General Commander of the Night Court's Armies. Known as the Lord of Bloodshed, he is one of the few Illyrian warriors to hold the rank of Carynthian. 

He is described as tall with shoulder-length black hair, hazel eyes, and tanned skin. Being Illyrian, he has membranous wings akin to a bat and bears the tattoos of an Illyrian warrior on his chest and back. He wears seven red siphons to help channel his power.

Cassian first appears in A Court of Mist and Fury. He is one of the main protagonists in A Court of Silver Flames, along with Nesta.