Pappy

Pappy is a pessimistic NPC who lives in Big Town. He claims to have come from Little Lamplight with his girlfriend Bittercup and the others hoping to find Big Town, a nice town with plenty of food and protection. Bittercup broke up with him when they found Big Town to be a shoddy bunch of houses and junk organized into a fortress that was constantly under attack by slavers and super mutants. Although he will at first greet you with " you're here to rape and pillage us aren't you?" if you save the town he will say " I have to admit I didn't think you were one of the good ones, but what the hell, THANKS!" and " have a crappy, aw hell, have a great day!"

Pappy is the only NPC in Big Town who can repair the player's items.

Bugs
'The following glitch may not be applicable for all versions and all platforms. It is fixed by the Fallout 3 patch 1.1.'

When talking to Pappy, the easy speech check "I heard you came here with Bittercup" dialogue option will never disappear, giving the player a chance to earn unlimited experience and an easy way to earn the Silver-Tongued Devil achievement. It's also useful for getting the Karma milestones. However, Pappy can die after the first mutant attack if you fail to stay and help the town.

Glitch(es)
Talk to Bittercup and find out that she and pappy once dated. Then go to Pappy and you will have the dialouge option '' You came here with Bittercup, right? '' If your speech level is high enough he will tell you in short what happened.

The dialouge option will sometimes not go away and therefore you can keep on getting XP and  Speeches Complete  from asking that question. Each time you ask it you will only get 5 XP but this is a good opportunity to get the achievement (For xbox 360)  Silver-Tounged Devil  (Won 50 Speech challenges)

Quotes

 * "Then she (Bittercup) started dating Flash and got all spooky. Good riddance."