@Harry: Wait.. 'current' Cerberus?? There were others before him?
My first Gatekeeper is where you’ve probably gotten the legends about a “three-headed beast” and the sort. Though, like all my previous gatekeepers, they decided to go through the quest gate to earn their way back to the world of the living. And they did. After that, Cerberus became a title for all gatekeepers after that in honor of the first one.
As for my current Cerberus’ real name? He went by XD:0021 in life, and got a new name when he came here.