Carlitos

 is a man living in the New Vegas in 2281.

Background
Carlitos Wayne was a made man working as a minor member of the Omertas at the Gomorrah hotel and casino. Unfortunately for him he ran afoul of Omertas lieutenant Cachino over his relationship with one of the prostitutes, Joana. Since Cachino also wanted the hooker he accused Carlitos of stealing Omertas funds and put a price on his head. Since then, Carlitos has been on the run.

Carlitos is hiding out in Vault 21 hotel as a guest of Sarah. He can be typically found in the hotel's diner sitting at a back table. In the quest Bye Bye Love, you assist him in rescuing Joana from Gomorrah.

Alternatively, Carlitos may be located in a back room away from the hotel's patrons as befitting a man on the lam. Your question objective marker should lead you to him.

Bugs
sometimes Carlitos does NOT appear anymore in Vault 21's diner.

To respawn him, go to Vault 21's diner and follow these instructions (without " "):
 * Press "^" or "~" to open the console.
 * Enter (flags Carlitos).
 * Enter
 * Enter
 * Carlitos will appear in front of you.

Appearances
appears in Fallout: New Vegas.