Gob

"Gob" Gobtholemew is a ghoul bartender at Moriarty's Saloon in Megaton. Treating Gob kindly will open up generous discounts and reveal some more of his personal past. Talk to Gob and other occupants of bar and you will learn that Gob was sold by Slavers to Moriarty and occasion has mentioned his mother and hometown. Through dialogue with Nova, the local prostitute, it is said that he's been stuck working for Moriarty for 15 solid years until he pays off his debts (which he's struggling to, as he needs to pay rent and food as well). Some bar patrons say that Moriarty treats him bad and would even suggest at him being the town's punching bag. Despite his appearance and the towns disrespect, he is depicted to be a fairly nice guy.

There is a way to earn some minor Good Karma during the opening conversation with Gob, if you are nice to him he will also give you discounts on food and drink. He can also give some information about Moriarty regarding your Dad.

When you talk to him he will mention that next time you go to The Underworld say "hi" to Carol. Though he doesn't tell you this she turns out to be his mother ("not really", but she loves him as her own). When you will talk to Carol you can tell her about Gob and his situation (in a positive or negative manner), but no further 'courier' conversation options open when you return to Gob.

Possible Bugs
Thereafter she will be miserable and you will be berated by Greta for spilling the beans.
 * If you speak to Carol no new dialogue will be present for Gob (causing this relationship to appear superficial).
 * If Gob is killed in the Megaton explosion, Carol will ask after him, at which point you can tell of her 'son's' demise. If you choose the option stating that you are the one who killed him, she and other Underworld residents will become hostile toward you.

Appearances
Gob appears only in Fallout 3.