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Soy people is a food that Rainicorns eat instead of real human flesh, introduced in the episode "Her Parents." At the end of this episode, Ethel explains that because all humans are thought to be extinct, they have never tasted real human flesh, but soy people is supposed to taste exactly the same and is apparently delicious. It looks like a ball of dumpling marinated in soy sauce that has a smiley face. Finn reluctantly took a bite of it and apparently liked it.
- It may be a reference to the film Soylent Green or more likely just to hufu, artificial human-flavored tofu made from soy products.