Since my name's been changed back by the forum change and I'm not Deathwing anymore, instead I'll be my own character.
Pathos Blackriver is a Forsaken undead night elf assassin who was killed defending Lordaeron from the Scourge sometime between the events of Warcraft III and World of Warcraft. Blackriver was born as Amon Kurokawa on a large island near Quel'thalas, where the Highborne remain the upper class of society and the other night elves live in poverty. When he was born, Amon and his twin brother Ruzan were sold into the service of the Highborne by their parents and eventually found themselves in the Order of the Rising Moon, a secret stealth operations group for the Highborne. While there, they were trained by an extremely powerful assassin, Shinta Hikomora, and taught the Rising Moon Style martial arts technique utilizing near inhuman reflexes and insight. Eventually, seeking better relations with the Alliance, the Highborne sent the Order to assist in battling the Scourge in Lordaeron. The assault was a disaster because the Highborne did not know of the Scourge settlements on the coast of Lordaeron, and many of the Order members were killed, including Amon. Ruzan fled to nearby Gilneas. Shinta survived, but his whereabouts are unknown.
When Amon was raised from the dead by the Scourge, he became the prime leader of the Thuzadin Guard, Kel'Thuzad's personal bodyguard unit. He was forced to kill many people until the Lich King's grasp finally broke free and he managed to escape. Returning to Tirisfal, Amon changed his name from Darnassian to Common, becoming Pathos Blackriver, and enlisted in the Forsaken Shadowstalkers. He quickly shot up the ranks to Captain due to his exceptional training. This is where Blackriver stands as World of Warcraft begins; at the side of the Banshee Queen, Sylvanas Windrunner.
Blackriver is a Rorshach-esque character who notices the moral flaws in all of the people around him and generally views life as corrupt. Because of this, he has a hard time trusting anyone or seeing anyone as a truly good person, and a lot of times he would prefer some people dead rather than alive. Despite this, Blackriver fights to destroy the strongest villains of Azeroth simply to feed his desire for retribution under the guise of protecting the innocent. He has gained the nickname "the Purgatory" among the Shadowstalkers because he either spares people entirely or ruthlessly slaughters them, depending on his opinion of them. Secretly, although Blackriver's life altogether has been none too pleasant, one specific event fuels his never-ending hatred for the wicked, and he hopes someday to get revenge. . .
Edit: He looks like my avatar, because that's a drawing of him. His interests are killing immoral people. Don't be so damned picky.
Edit 2: This character is actually one of the main characters from my own stories, and I figured it would be rather natural for me to RP as him.