Based on current information, 'Planet Single: Greek Adventure' does not appear to feature any transsexual characters or explore related themes. The film's plot focuses on romantic comedy and detective elements involving friends on a Greek island, with no mention of transgender or transsexual identities in character descriptions or story arcs.

The movie does not contain any action or adventure elements.

The film features original characters from an existing franchise who maintain their established genders from previous installments. There is no indication of any character's on-screen gender differing from their canonical or historically established gender.

The major characters are established within the film's narrative as Polish tourists vacationing in Greece and are portrayed by Polish actors. There is no indication that these characters were canonically or historically established as a different race prior to their portrayal.