Sergio

 is a member of the Kings faction living in Freeside. He is located near the southernmost corner on the first floor of The King's School of Impersonation.

Interactions with the player character
He will change your hairstyle, facial hair & color.
 * Note: you can only get Sergio's services if you join the Kings, which can be done by completing the quests for the King and getting your one wish.

Appearances
appears in Fallout: New Vegas.