The film lacks LGBTQ+ characters or non-cisnormative identities. Interpersonal dynamics focus on platonic childhood friendships and traditional heteronormative archetypes.

Gender roles follow 1980s animation conventions. While Shizuka shows occasional bravery, male protagonists drive the primary action and decision-making processes.

The human cast is a homogeneous Japanese group. However, the robotic inhabitants of Mecao serve as a metaphor for 'the other' and displaced entities.

The narrative explores coexistence and the ethics of conflict. It reframes invaders as refugees, disrupting simple binaries of good versus evil.

There are no prominent depictions of physical, sensory, or neurodivergent disabilities. Characters operate within a standard range of physical capability.