|Cause of Death||Accelerated pregnancy and birth|
|Killed by||Patrick Ross (impregnated by him)|
|Family|| Unnamed younger sister (deceased)|
Unnamed son (deceased)
Unnamed nephew (deceased)
|Played by||Nancy La Scala|
When first seen in the film, the woman known only as Debutante is making out with Patrick Ross in a secluded lounge when Patrick is called away to give a speech at a fundraiser. She invites Ross up to her hotel suite after the speech. When the speech is done, Patrick arrives to the suite, seeing Marcy has been accompanied by another woman introduced as her sister, claiming that the two women share everything together.
Shortly afterward, Marcy has intense sex with Patrick while her sister amorously watches them. As they both reach orgasm, Patrick ejaculates into her to which Marcy refers to her sexual partner as a hero and moves off the bed as her sister expresses a turn to have sex with Patrick. As Patrick and her sister begin the love-making gyrations, Marcy blissfully heads for the adjoining bathroom.
In the bathroom, Marcy examines herself in the mirror and begins to notice something unusual with her body. As Patrick's sexual intercourse continues with her sister, Marcy begins to exhibit signs of an early pregnancy. Suddenly, she gasps as she clutches onto her stomach. Moments later, her stomach begins to swell as she feels movement inside. Terrified, she screams and backs away from the counter and falls against the walls. Once her stomach has distended completely, it splits open and reveals a blood-covered half-breed alien infant emerging from her, revealing she had been impregnated by Patrick.
Once she has given birth to her and Patrick's offspring, she dies from the accelerated pregnancy and birth, survived by said offspring.
Unlike the film interpretation, the Debutante is a younger, blond-haired woman named Lindsey. She encounters Patrick Ross at the fundraiser and comes onto him, just as he is about to go give a speech. She then invites him to her hotel suite like in the film, and is there to introduce him to a dark-haired woman she says is her sister.
Shortly afterward, she has just finished having sex with Patrick and moves off the bed to go to the bathroom and allow her sister to have sex with Patrick. In the bathroom, it's revealed that her sister isn't really her sister but her best friend from college, and that they would every now and then go after unreachable men using their charms, often on a dare.
As she hears her friend enjoying herself with Patrick, she makes a move toward the bathroom door, intending to join them in a threesome, but begins to feel nauseated and like she's going to throw up. She then sees that her belly has distended and backs against the wall, sliding to the floor. Screaming upon the splitting of her stomach and the sight of the alien infant, she passes away five seconds later.
According to the novelization of the film, she wasn't Lindsey/Marcy's sister, but her best friend from college. They had often dared each other to go after the men around the campus during their time in college, succeeding in seducing most in the hierarchy. At the fundraiser, they set their eyes on Patrick and do the same with him. In the novelization, she was waiting for Patrick with her best friend in the hotel suite on the bed, clad in only matching, silk lingerie. In front of Patrick, she reached over and ran her hand slowly up her friend's thigh, sliding her fingers beneath the line of fabric at the hip joint and her friend shuddered, suggesting that Lindsey/Marcy may have had lesbian experiences with Claudia/Lucy when they were with other men.
It's unknown how they met in the film version, but in the novelization, she came on to him prior to him giving his speech at the fundraiser and then invites him up to her hotel suite. She was clad only in nearly matching silk lingerie with her sister when he arrives. There, she introduces him to her "sister" and they engage in sexual intercourse. Once they're done, she declares him a hero and allows her "sister" to have sex with him while she goes to the bathroom. In there, we discover that the both of them were just looking to sleep with him like they had done with other men. He ends up impregnating her and being the indirect result of her death as she brought his firstborn child into the world.
She doesn't really have a relationship with her and Patrick's only son. After being impregnated by Patrick, she immediately gives birth to him in the bathroom and dies shortly after. Her pregnancy with him being the direct result of her death, and the acceleration of the gestation causing her belly to burst open to release the newborn.
- "Lincoln suite, upstairs. Hurry."
- "It's open. Come on in."
- "My sister decided to join us."
- "We share everything. Together."
- "Ah, you are a hero. Oh, god!"
- "My god! Ohhh!! Ahhh!!"
- "It's open." (Novelization)
- "We've been waiting for you." (Novelization)
- "I'd like you to meet my sister." (Novelization)
- "We share everything." (Novelization)
- "Oh, my God." (Novelization)
- "You really are a hero." (Novelization)
- My goodness, but that man could move! (Thought from Novelization)
- That silly girl, the whole dorm had always known when she made orgasm. (Thought from Novelization)
- What the hell. (Thought from Novelization)
- No one ever said I couldn't join in. (Thought from Novelization)
- She is credited as "The Debutante", but Marcy's name is revealed in the movie when her sister screams for her help.
- In both the movie and novelization, Marcy/Lindsey is unique for being the first human woman to bear hybrid offspring.
- Excluding the Species comic series Human Race, Marcy/Lindsey shows what befalls any human woman impregnated by a male of the alien species: A feeling of nausea, breast discomfort, some stomach pain, sweating, rapid distension of the stomach as the unborn hybrid fetus develops quickly, belly bursting, and eventually death.
- In the novelization, her name is Lindsey.
- In the novelization, Claudia is her best friend, not her sister.
- In the televised version of the film, the bathroom scene is edited to feature Marcy holding her stomach and screaming as the scene cuts to Eve in her room being monitored.
- In the film version, she's the only known sexual partner of Patrick to have a mole located on her body (her back in this case).
- Debutante is a alias she used in the film when she and her sister engaged in sexual intercourse with Patrick Ross.