Lifeforce, a sci-fi horror film, primarily explores themes of alien vampirism and human survival. The narrative does not include any identifiable LGBTQ+ characters or explicitly address queer themes, resulting in no direct portrayal of LGBTQ+ identity or experiences within the story.

Lifeforce (1985) does not feature identifiable transsexual characters or themes. The film's alien antagonist possesses human bodies of different sexes as a predatory act, a sci-fi horror trope unrelated to human gender identity or experience.

The film features a primary female alien antagonist whose method of incapacitating or defeating opponents is through a supernatural life-draining ability, not through direct physical combat such as hand-to-hand fighting or the use of melee weapons. No other female characters engage in or win physical combat against male opponents.

The film "Lifeforce" is an adaptation of the novel "The Space Vampires." All major characters, including the primary alien and the human protagonists, maintain the same gender as established in the original source material.

The film "Lifeforce" is an adaptation of the novel "The Space Vampires." A review of major characters from the source material and their portrayal in the film reveals no instances where a character's established race was changed.