Captured a few months back during a raid just north of Megaton, Frank has yet
to adjust to life as a servant and acts up constantly. He's been placed in charge
of drinks at the bar, as bar patron Ymir doesn't take kindly to his drinks being spilled.
When the player approaches the food court region of Paradise Falls where Frank works, he is promptly accused of watering down the vodka and killed by Ymir who uses his super sledge to smash Frank before he can even react.
If the player interrupts the conversation between Ymir and Frank before Ymir kills him, Frank will not be killed, however as Frank is meant to be killed, he is not available to trade with you, even though he is a bartender. The only speech option you receive is "I have to go now".
Aggravating the slavers will also make Frank hostile, causing him to attack you with his bat.
Ymir and Frank may still have their conversation, even if both of them are attacking the player.