The film "The Secret of NIMH" does not feature any identifiable LGBTQ+ characters or themes within its narrative. The story focuses on a widowed mouse's struggle to save her family, with themes centered on courage, community, and survival, without engaging with queer identity.

The Secret of NIMH is an animated fantasy film featuring anthropomorphic animals. Its narrative focuses on themes of courage, family, and survival, and it does not contain any identifiable transsexual characters or explore related themes.

The film features Mrs. Brisby, a field mouse, who faces various challenges and antagonists. Her successes are achieved through courage, wit, and the use of a magical amulet, rather than direct physical combat against male opponents. Other female characters do not engage in significant physical combat.

The film adapts the novel "Mrs. Frisby and the Rats of NIMH." All major characters, such as Mrs. Brisby, Justin, Nicodemus, and the Great Owl, maintain the same gender as established in the original source material.

The film's characters are anthropomorphic animals (mice, rats, etc.). As such, they do not possess human racial characteristics, making the concept of a 'race swap' inapplicable to this adaptation.