Quiet Investigation (1986)

Based on the information provided, the film '{Tikhoe sledstvie}' does not appear to feature any identifiable LGBTQ+ characters or themes, resulting in a 'N/A' rating for its portrayal.

The movie does not contain any action or adventure elements.

The film "Tikhoe sledstvie" is an adaptation of a novel by Arkady Adamov. Key characters from the source material, such as Arkady Adamov and Inspector Larin, maintain their established genders in the film adaptation. No instances of gender swapping are identified.

This 1986 Soviet crime drama is not an adaptation of a work with pre-established character races, nor does it depict historical figures whose race was altered. There is no evidence of characters being canonically or widely established as one race and then portrayed as another.