City of Ember does not include any discernible LGBTQ+ characters or themes. The narrative centers on two heterosexual teenagers discovering a way to save their city, with no elements suggesting queer identities or experiences are present in the story.

The film 'City of Ember' does not feature any identifiable transsexual characters or themes. Its narrative centers on a dystopian society and the protagonists' journey of discovery, without engaging with transgender identities or related issues.

The film features female characters, including the protagonist Lina Mayfleet, who are involved in scenes of pursuit and escape. However, there are no instances where a female character engages in and wins direct physical combat against one or more male opponents through skill, strength, or martial arts.

The film "City of Ember" is an adaptation of the novel by Jeanne DuPrau. A review of the main characters in both the source material and the movie reveals no instances where a character's established gender was changed for the screen adaptation.

The source novel, "The City of Ember," does not specify the race of its characters. Therefore, no character in the film adaptation can be considered a "race swap" as there was no established race to change from.