Monster Island does not feature identifiable LGBTQ+ characters or themes. The film's narrative centers on a wartime survival story and the relationship between its two male leads, without exploring LGBTQ+ representation or related social issues. Consequently, the net impact on LGBTQ+ portrayal is N/A.

Monster Island (2025) does not feature transsexual characters or address the transsexual community. Reviews and plot summaries indicate the film's focus is on war, survival, and horror, without any intersection with gender identity issues. Therefore, there is no depiction of transsexual themes.

Monster Island centers on two male protagonists, a Japanese soldier and a British POW. The film does not feature any significant female characters in combat roles, nor are there any scenes depicting a female character defeating male opponents in physical combat.

The film is described as an original story focusing on two male protagonists, with no indication of pre-existing characters whose gender was altered. The provided information explicitly states no gender-swapped roles are featured.

The film features original characters, a Japanese soldier and a British prisoner of war, set in a historical context. There is no indication that these or any other characters were previously established in source material or history as a different race, thus precluding a race swap.