The film 'Marshmallow' (2025) focuses on a science fiction horror narrative set at a summer camp. Based on all available information, there is no evidence or description indicating the presence or portrayal of LGBTQ+ characters or themes within the movie's plot or character arcs.

Based on the available information, there is no indication of transsexual characters or themes in 'Marshmallow (2025)'. Consequently, an evaluation of the film's portrayal of the transsexual community or related themes cannot be made due to insufficient data.

The movie does not contain any action or adventure elements.

Marshmallow (2025) is an original film featuring entirely new characters, not based on any pre-existing source material or historical figures. Therefore, no characters have an established canonical gender from which to be swapped.

The film "Marshmallow" is an original production with no prior source material or established character races. Therefore, no character can be considered a "race swap" as defined.