Based on available information for 'Appu' (1990) directed by Dennis Joseph, there are no identifiable LGBTQ+ characters or themes present in the film's narrative. The movie is primarily a romantic drama without explicit queer representation.

The film 'Appu' (1990) does not feature any identifiable transsexual characters or themes. Its narrative primarily focuses on a romantic drama with family elements, and there is no engagement with transgender identity or experiences within the story.

The movie does not contain any action or adventure elements.

The film "Appu" (1990) is an original Malayalam production, not an adaptation of existing source material with established characters or a reboot of a prior ensemble. Therefore, its characters are new creations for this specific film, precluding any gender swaps as defined.

Appu (1990) is an original Malayalam film, not an adaptation, biopic, or reboot. Its characters do not have pre-established canonical or historical races from source material, previous installments, or real-world history that could be subject to a race swap.