Grease (1978) does not feature any identifiable LGBTQ+ characters or themes. The narrative is entirely centered on heterosexual relationships and the social dynamics of 1950s high school, with no explicit or implicit queer representation present in the plot or character arcs.

Grease does not include any identifiable transsexual characters or themes. The narrative centers exclusively on cisgender characters navigating high school relationships and social pressures in the 1950s, with no elements related to gender identity beyond traditional male and female roles.

The movie does not contain any action or adventure elements.

The 1978 film "Grease" is an adaptation of the 1971 stage musical. All major and minor characters in the film retain the same gender as their established counterparts in the original source material, with no instances of a character being portrayed as a different gender.

The 1978 film adaptation of "Grease" maintains the established racial portrayals of its characters from the original stage musical. No major or legacy character was depicted as a different race than their canonical or widely established representation.