In the Gundam Seed series, a 'Natural' is a mocking term for an unaltered human, whereas a Coordinator is a human augmentative during their embryonic stage.

Term

Although considered a common for the 'normal' masses living on Earth, the ZAFT forces use this term as an insult to those who have not received modification. Naturals are an average human being, but presumably lack the reflexes to pilot mobile suits.

This disadvantage left the Earth Alliance initially losing the First Bloody Valentine War.