The film 'Line Walker' does not feature any identifiable LGBTQ+ characters or themes. Its plot is solely centered on crime, police work, and action, resulting in no portrayal of queer identity.

The film 'Line Walker' is an action crime thriller that does not feature any identifiable transsexual characters or explore transgender themes within its narrative. No relevant depictions were found.

The film features Yik Siu-nga as a significant female character involved in the plot. While she is an undercover police officer and present in action sequences, there are no clear instances where she or any other female character defeats one or more male opponents in direct physical combat using hand-to-hand, martial arts, or melee weapons.

The 2016 film is a spin-off/sequel to the 2014 TV series. While it features some returning characters, their genders remain consistent with the source material. New characters introduced in the film do not appear to be gender-swapped versions of established characters.

The film is a spin-off/prequel to a Hong Kong TV series. All major characters, whether new or returning, are portrayed by East Asian actors, consistent with the original series and setting. No character established as one race in the source material is portrayed as a different race.