Eternals: 24 WTF Moments
4. Sprite Gives Up Her Immortality
After defeating Tiamut, Sersi still has the Uni-Mind, and asks Sprite if she truly wants to experience what it's like to live like a human, warning her that the cost is a short lifespan.
Sprite agrees, having her immortality stripped away as requested. Obviously in subsequent scenes she still looks like her 12-year-old self, though this will provide a rather convenient explanation for why actress Lia McHugh will unavoidably look older in any future MCU appearances.
Given that Eternals started shooting almost two-and-a-half years ago, young McHugh will have already aged noticeably, so this is a smart, pragmatic decision all things considered - and a neat payoff for one of the film's more tragic heroes.