Rosa Diaz's bisexual coming out in episodes 9 ('99') and 10 ('Game Night') forms a significant mid-season arc, where she reveals her identity to the squad and parents, who accept her, positioning non-traditional sexuality as a focal point for her development and emphasizing family acceptance narratives. This is layered onto an established tough Latina character, highlighting identity politics. Ongoing representation includes the gay Black Captain Holt, whose commissioner bid ties to serving underserved communities, and diverse casting (Latina detectives, Black sergeant Terry rejecting stereotypes).

Prison opener episodes lightly touch homophobia, antisemitism, and guard violence, while other moments address tokenism in promotions and gender dynamics in leadership rivalries. These elements manifest as direct acknowledgments of marginalized experiences amid humor, with reviews noting the show's 'we see you' approach to audiences. Creator intent from Schur and Goor emphasizes intentional diversity from inception, extending to S5. Reception mixes praise for sincere bi rep and stereotype defiance with minimal backlash specific to this season, though some attribute Fox cancellation post-S5 to diversity/LGBTQ focus; elements enhance appeal to progressive viewers but remain subplots amid entertainment.