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 you will be attacked by the residents of Underworld (except Sydney, if you have completed Stealing Independence). His body will have a key to unlock his fridge which contains a few stimpacks and about 200 caps. If the player kills Ahzrukhal, Charon will not be able to be hired, as he will believe Ahzrukhal is still alive. Because of this, it is advised to let Charon kill him after purchasing the contract. Some of the customers at The Ninth Circle will comment on his death if Charon kills 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.