Countdown

Countdown is a "cut content" non-player character in the Fallout: New Vegas add-on, Old World Blues.

Background
A pale woman with no clothes. Judging by her name, it's probable that she was intended as a placeholder 'narrator' character to play the lines of a countdown (going by a scriptline in NVDLC03X8CaveCountdownSCRIPT the one when Gabe explodes), though it is also possible that it was her actual name during development. She shares her facial appearance with Meg Reynolds from the base game, as they are copied from the same template.

Appearances
Countdown appears in the game files of the Fallout: New Vegas add-on, Old World Blues, but was cut from the final add-on.