Not much is known about Yvette. She is the main one in charge of the small-time raider gang known as the Scorpions, who are involved in slinging chems within and out of the Vegas area. Petty and overconfident, the actions of the Scorpions frequently get themselves into fights with the Fiends. Like other raider gangs, the Scorpions will attack strangers on sight.
Ammunition for the Scorpions: At some point in development Yvette would have been the source of an optional, unmarked quest to aid the Scorpions gang in obtaining "a steady supply of ammunition from the NCR quartermaster at Camp McCarran." This quest was never fully implemented, but some resources related to it remain, in particular, a note titled "Ammunition for the Scorpions."
↑The Courier: "Can you tell me about Westside?" Klamath Bob: "Well, things aren't great here, but I've seen a lot worse. We've got the Fiends to the south of us, and that ain't good. The Scorpions hang out at the Monte Carlo when they aren't slinging chems or getting their heads blown off by the Fiends." (Klamath Bob's dialogue)
↑The Courier: "Tell me about the Scorpions." Klamath Bob: "Not much to tell. Typical gang of dumb bullies and angry nobodies. They're holed up a bit south of here, in the Monte Carlo Suites. They think they're tough, but any time they tangle with the Fiends, they get torn right up." (Klamath Bob's dialogue)