Andy Stahl

 is the owner of The Brass Lantern, he hates Megaton but doesn't leave because travelers through Megaton, such as the Vault 101 Dweller, keep him happy with a steady supply of caps.

Possible Bugs
This NPC is one of the few characters which is known to randomly disappear and never be found again.(I have found him dead once lying across from the bomb) This is often the result of Stahl falling from stepping off an overhead walkway or getting stuck in the water behind the bomb and dieing of rad poisoning.