Ahzrukhal

Ahzrukhal is the bartender who stays in The Ninth Circle in the Underworld, which is located in the Museum of History.

Initially, Ahzrukhal only offers alcohol, but through dialogue options (no speech check) you can convince him to sell you drugs like Buffout and Jet, even Stealth Boys.

Hacking Ahzrukhal's computer will reveal some of his misdeeds, including planning to steal medicine from the doctor to sell at his bar.

Unmarked quest: Hired Help
Ahzrukhal has the contract for Charon, which you can purchase for 2,000 caps (or 1,000 if your barter is 50 or higher). You also will have the option to kill Greta to obtain the contract.

See Hired Help for more info.

Killing Ahzrukhal
Killing Ahzrukhal yourself will result in positive karma but will cause the surrounding NPCs to attack you, except for Sydney, who will wander around in the bar if you have completed the quest Stealing Independence. One way to get positive karma and not be attacked is to simply kill Ahzrukhal from a distance (by using a magnum or sniper for a head shot), and exit the door waiting one hour immediately after leaving, then re-entering the Ninth Circle will cause the NPCs to not attack you. His body will have a key to unlock his fridge where, strangely, he keeps stimpacks and about 200 caps. Charon will not be able to be hired this way, he will still talk to you as if Ahzrukhal was still alive. The best way to kill him is to let Charon kill him when you obtain him as a companion. Some of the customers at The Ninth Circle will mope about his death if Charon killed him.

Bugs
Sometimes when you inform Charon that you have obtained his contract he will walk up to Ahzrukhal and do nothing. This will prevent you from talking to both Charon and Ahzrukhal. (confirmed on PS3 and 360)

Appearances
appears only in Fallout 3.