Ebonlocke

Ebonlocke is a ghostly noble, member of the Nobles of Darkshire, located at the Banquet Hall in Karazhan. He is annoyed by the party, organized by Moroes.

Quotes
This party is pointless. Those foolish nobles will never get to see Medivh. Can't they see this? I should have just stayed in Darkshire with my family instead of wasting my time here.
 * Gossip

Speculation

 * Due to his gossip where he refers to the other six nobles as "those" and the fact that Exploring Azeroth: The Eastern Kingdoms states that "all of six of the nobles of Darkshire were the final ones to enjoy such hospitality as living beings", it is likely that Ebolocke was killed at a different time than the others.
 * He may be related to Kanrethad, a member of the Council of the Black Harvest.