The film 'Children of the Sea' does not feature any identifiable LGBTQ+ characters or themes. The narrative centers on a young girl's mystical experiences with two boys connected to the ocean, exploring themes of nature, life, and the universe without incorporating any queer identities or relationships.

The film 'Children of the Sea' does not feature any identifiable transsexual characters or themes. Its narrative centers on a young girl's mystical connection with the ocean and two mysterious boys, exploring ecological and spiritual concepts without engaging with transgender identity. The story is devoid of any plot points or character arcs related to transsexual experiences.

The film focuses on a young girl's mystical connection to the ocean and cosmic events. It does not feature any female characters engaging in or winning direct physical combat against male opponents. The narrative emphasizes discovery and wonder over action or martial encounters.

The film is an adaptation of the manga series "Children of the Sea." All major and named characters, including the protagonists Ruka, Umi, and Sora, retain their established genders from the original source material without alteration.

The animated film is a direct adaptation of a Japanese manga. All main characters, including Ruka, Umi, and Sora, are depicted in the film consistent with their original East Asian or ambiguously human (within an East Asian context) portrayals in the source material. No character's race was altered from the established canon.

Not depicted in the film.