The film focuses on Irish Catholic family dynamics and heterosexual relationships among siblings and their adult children. There are no identifiable LGBTQ+ characters, themes, or subplots present in the narrative, nor are any mentioned in available descriptions or reviews.

The Family McMullen (2025) centers on romantic entanglements and Irish-American Catholic family dynamics. Based on all available information, there are no identifiable transsexual characters or themes present in the film's plot, cast, or promotional materials, indicating no depiction of such elements.

The movie does not contain any action or adventure elements.

Available information indicates that no characters in The Family McMullen (2025) have an on-screen gender that differs from their established canonical gender in the source material, The Brothers McMullen (1995). Returning characters maintain their original genders, and new characters are presented consistently.

The original film, The Brothers McMullen (1995), did not specify phenotypical details for its characters beyond being an Irish-American family. The sequel introduces new characters and actors whose casting does not contradict a previously established race, nor does it involve a shift in broader racial category for returning or legacy characters.