Name- Illisar
Age- The age of the Hound of Darkness is uncertain though he is figured in many myths and was around when the fae courts split
Gender- Believed to be male though mainly from the voice and the gaping maw filled with pointy teeth that is shown when he feeds.
Appearance- Lord Illisar is known to be tall and thin if only because the robes that drape around his form are baggy and hang off him rather than being pulled tight around him. His movement has a predator's grace to it but does not appear to be refined or polished in anyway simply a natural almost animal grace. The robes that hang from him are deceptively difficult to pierce and their red and black colors appear to be the embodiment of blood and darkness respectively. His eyes have never been seen covered as they are by the great metal mask/helm that covers his face including his mouth except when he feeds. Illisar's mouth is diseased looking and far larger than either a normal human's would be, the lips do not fully cover the teeth when it is closed and the teeth themselves are long and pointed.
[spoiler][/spoiler]
He looks much like that picture, only his mask has sliding metal plates that also cover his mouth. (Sorry for using a mouth of sauron concept picture, it was the closest I could find and just meant to give an idea of what I mean when describing his appearance.)