We meet the biggest mystery of Avatar: The Way of Water less than five minutes into the movie. That mystery is Kiri (Sigourney Weaver), a young Na'vi child who is the daughter of scientist Grace (also Weaver) from the first Avatar.

"But wait," you may ask. "Didn't Grace die in the first movie? I don't remember her having a child."

You would be right on both counts! Grace did, in fact, die, and she didn't leave behind a child. However, she did leave behind her Na'vi avatar, which Jake Sully...

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