Me being the hoarder of items I am, I stumbled upon the mention of this character while speaking with one of my friends. I decided to look him up here, and followed the instructions back to The Depths where he was allegedly located. However, I have already run through there, so once I didn't see him I carried on back to Firelink, to his respective bridge. I didn't see him there, and I certainly didn't kill him. Is it possible I missed him in the Depths, or that my irresponsible use of the Master Key messed something up?