The film "The Yin-Yang Master: Dream of Eternity" does not feature any identifiable transsexual characters or themes within its narrative. Consequently, an evaluation of its portrayal of such elements is not applicable.

The film features the Princess, who, in her transformed state as the Serpent Demon, engages in combat with male characters. However, her victories are achieved through overwhelming supernatural powers and magical abilities, rather than through skill, strength, or martial arts in close-quarters physical combat.

The film adapts the 'Onmyōji' novel series. Key characters like Abe no Seimei (Qingming) and Minamoto no Hiromasa (Boya) retain their canonical male genders. Other characters are either original to this adaptation or their source gender was not explicitly fixed in a way that constitutes a gender swap.

The film adapts a Japanese novel series with characters originally depicted as Japanese (East Asian). The movie features Chinese and Taiwanese actors portraying these characters, maintaining their East Asian racial identity. This constitutes a shift in ethnicity/nationality, not a race swap.