Diane (Fallout: New Vegas)

Diane is a Great Khan living in the Red Rock Canyon in 2281.

Background
Jack and Diane are advisers to Papa Khan. The pair run a drug-trafficking ring and supply the Great Khans with drugs. Jack makes the drugs, and Diane handles the business. According to Regis, Jack and Diane have been close since childhood, and it is implied that they have an emotional attachment to each other, or at least Jack does, since he becomes upset when told that the Legion would put Diane into slavery.

Quests

 * Aba Daba Honeymoon: Diane needs someone to run drugs between a couple of places. The Courier would make a fine candidate.
 * Oh My Papa: Diane is one of the influential figures that Papa Khan listens to. She will need to tell him that the alliance with Caesar's Legion is not the best idea.

Effects of player's actions

 * If the player character has a negative reputation with the Khans, Diane will not interact with them, instead saying, "Get away from me, you lunatic!"
 * If the player character has killed Motor-Runner or the Fiends' Driver Nephi, Cook-Cook or Violet, Diane will express frustration that somebody took out some of their biggest clients, apparently unaware that it was the player character.

Other interactions

 * After completing the quest Aba Daba Honeymoon, Diane will teach Courier a special unarmed perk called Khan Trick.
 * If the Courier can pass a 50 Barter check, they can convince Diane that it would make more sense to try to sell helpful chems to the surrounding settlements; with a success, she will agree and the player character will get 50 XP and positive Karma.

Appearances
Diane appears only in Fallout: New Vegas.

Behind the scenes
"Jack & Diane" is a song title by John "Cougar" Mellencamp about "two American kids doing the best they can," similar, in a way, to the pair of Great Khans named in homage to them.

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