In Pixar’s Coco, a dead person risks losing their existence when nobody in the living world remembers them. The film calls this final disappearance “the Final Death.”
The Land of the Dead contains people who continue to exist because living relatives remember them, especially through family photographs and Día de los Muertos offerings. Those remembered dead can visit the living world during the holiday, crossing a marigold bridge when their photographs are placed on an ofrenda.
Héctor fears the Final Death because his daughter Coco is the last person who remembers him. His urgency initially makes him seem selfish, but the danger is rooted in the film’s rules about memory, family, and identity. Once Coco grows old and her memories fade, Héctor may disappear permanently.
The idea is fictional and supernatural rather than a literal description of Mexican tradition. Coco uses it as a storytelling device to emphasize that remembering ancestors can preserve family history and emotional connection across generations.