The film 'Tunnel' does not feature any identifiable LGBTQ+ characters or themes. Its narrative is centered on a disaster survival scenario and societal commentary on emergency response, making no reference to queer identities or experiences.

The film 'Tunnel' does not feature any identifiable transsexual characters or themes. Its narrative is entirely centered on a disaster survival scenario, focusing on the protagonist's struggle, the rescue operation, and a critique of bureaucracy and media. Therefore, there is no portrayal to evaluate.

The movie does not contain any action or adventure elements.

The film "Tunnel" (2016) is an adaptation of a novel. A review of the main characters from the source material and their portrayal in the film indicates no instances where a character's established gender was changed for the screen adaptation.

The film "Tunnel" is a South Korean production based on a South Korean novel. All primary characters, implicitly East Asian in the source material, are portrayed by East Asian actors in the film, with no changes to their established racial identity.