No LGBTQ+ characters or themes appear in the film. Elements like rainbows function as plot devices for time travel and motifs of hope amid climate crisis, unlinked to queer representation despite external misinterpretations in some markets.

No transgender characters or themes appear in the film. The story centers on a time-traveling boy and a girl navigating environmental challenges in a futuristic setting, without addressing transgender identity.

The story centers on a 10-year-old girl, Iris, who discovers and assists a boy from the future amid environmental perils and chases. Escapes involve evasion of police robots and eccentric brothers, but no direct physical confrontations or victories in hand-to-hand combat occur.

Arco features original characters in an animated science fantasy narrative, with no adaptations from source material, prior installments, or historical figures that involve gender swaps.

Arco is an original animated film sharing only a robot character from the director's prior comic, with no established racial depictions for human characters in source material, so no race swaps occur.