There isn't much known about her history.
Throughout From Dusk Till Dawn
In From Dusk Till Dawn 2: Texas Blood Money, she and Buck were making love while he was trying to watch a movie on the TV. He told her to take a breather and she tells him she's the one doing the work. They soon see the news about Luther Heggs and notices Otis, and asks if he was the one who put Buck away, with Buck muttering "rotten bastard".
Afterwards, Otis shows up at Buck's house and asks him where Luther is since they are friends. Marcy declares she's seen him, and he asks where, to which she replies on the TV. Buck then gets a call and unbeknownst to Otis, it's Luther, and after he gets off the phone with him, Marcy remarks that Buck's mother is dead.
She has medium length blonde hair and light blue-green eyes. She wore a light blue waitress uniform with her name tag on it and dark red skirt. She also wore a wristwatch on her left wrist.
She seems to be friendly and cares for Buck, but will get smart, especially when Otis asked her about where Luther was.
- Marcy is Latin and means "Mars" (Roman god of war) or "warring". It derives from the Roman clan 'Marcius'.
- Stacie Randall was credited as Stacie Bourgeois in the movie.