Chemical Hearts does not include identifiable LGBTQ+ characters or themes within its narrative. The film focuses on a heterosexual coming-of-age romance, exploring themes of first love, grief, and mental health through the experiences of its two main protagonists.

The film "Chemical Hearts" does not feature identifiable transsexual characters or themes. The narrative centers on a high school senior's first love and his relationship with a mysterious new student dealing with past trauma. The story focuses on their emotional journey and personal growth, without incorporating any elements related to transsexual identity.

The movie does not contain any action or adventure elements.

The film "Chemical Hearts" adapts its source material without altering the established genders of its main characters. All significant roles maintain their original gender portrayals from the novel.

The film adapts a novel where the racial identities of its main characters were not explicitly established in the source material. The casting choices for the on-screen adaptation do not deviate from the general understanding of the characters' races as presented in the original work.