"Durdagnir sings. The songs of battle is so clear and sharp in my mind, just like the edge of its blade. So sing the Song of Battle, Durdagnir, drink the blood of the Enemy and don't rest, or brake, or splinter till the revenge of the fallen run its course."

                               From the diary of Rutbragol Carandur, the Red Faced Orc Slayer

Rutbragol is a strange name. He gave it to himself long time ago, his real name buried deep beneath the corpses of the Orc kind. He is born of Sudden Anger, Red Faced, disfigured in the fires of the battle heat, doomed to keep his face hidden from sight.

Do not trust him, he will not trust you in return. He speaks fondly and kindly enough to his kin, but he trusts only his Bane of Darkness, his only friend and companion, dark blade Durdagnir. When it is planted deep in the chest of an Orc in search of its black heart then he and his sword are truly alive and then Durdagnir sings the Song of Battle. Rutbragol is not going to share the words of the Song with you, you will know it when you hear it on your own. 

He has an origin, and some strange story to tell no doubt, but it is buried deep in the past and you can read that tale in his disfigured and scarred face. But you will not see it, he will not show you his face. When he eventually falls you can remove the mask from his face and read a story that reached the end.