This unity-across-differences theme drives the season's plot, including Eva's alliances with Queen Ojo, her sister Eight, and efforts to deliver the Heart of the Forest. The adaptation features a confirmed race/ethnicity change for the established book protagonist Eva Nine—originally depicted with blond hair and pale skin, now voiced by Jeanine Mason (Cuban-American) with tanned skin and dark hair—placing the score at or above the 5 floor for such changes.

Voice casting includes diverse performers in roles like Rovender (Gary Anthony Williams) and Besteel (Chiké Okonkwo), though most align with original alien characters rather than forced swaps. Creator and cast statements highlight the story's intent to model connection and empathy for young audiences navigating differences. Reception shows no major backlash, with focus on the adventure's emotional stakes rather than ideological critique.