Immigrant characters and prejudice against them (e.g., Kei as a Russian-Japanese returnee facing xenophobia, refugees from conflict zones with elevated crime coefficients) appear as plot devices to expose system blind spots and integration failures, directly tied to the story's core questions about justice, free will, and institutional flaws rather than standalone identity politics. Creator statements emphasize depicting modern Japan's immigrant treatment issues and expanding the world with a new cast and time jump, without activist framing or mandates.

Casting uses original characters voiced by standard Japanese actors (Yuki Kaji as Shindo, Yuichi Nakamura as Ignatov); no established character race/gender swaps or foregrounded non-traditional identities occur. Reception highlights the immigration and prejudice themes as effective social commentary within the sci-fi premise, with no notable backlash labeling it "woke" or prioritizing message over story.