Post-death (Avatar & Avatar: The Way of Water) One year after the battle, Grace's avatar, which was rendered brain-dead, gave birth to a girl named Kiri.
Dr. Grace Augustine, the highly memorable Sigourney Weaver Avatar character in the original, died at the hands of Colonel Miles Quaritch (Stephen Lang), Avatar's villain. But Weaver returned for Avatar: The Way of Water as an entirely different character — a Na'vi child. In the first Avatar movie, Dr.
Jake visiting Grace's English school several years after the attack. Two years after the events that killed Sylwanin and other children, Grace, Jake Sully and Norm Spellman visited the school, now in ruins. Since the school closed, it has only been used as a storehouse.
Grace died, but she also didn't deliver her child. But Grace left behind her Na'vi avatar, which was kept in stasis by Neytiri, Jake Sully, and her other scientist friends, as per media reports. Grace's avatar gives birth to Kiri, and Jake adopts her.
Grace was born in 2103-2104 and was a teenager when Pandora was being colonized. She came to Pandora at the age of twenty years old, thirty years before Jake and Norm.
Augustine's colleague Norm Spellman (Joel David Moore) was the father and Grace conceived Kiri before the end of Avatar before somehow giving birth in her Avatar body. However, the more interesting theory is that Kiri is literally the child of Eywa due to some sort of immaculate conception.
Many cast members from the first two movies are slated to return, including Sam Worthington (Jake Sully), Zoe Saldaña (Neytiri), Sigourney Weaver (Dr. Grace Augustine), Joel David Moore (Norm Spellman), Jack Champion (Javier 'Spider' Socorro), Stephen Lang (Colonel Miles Quaritch) and Britain Dalton (Lo'ak).
While Dr. Grace Augustine died in the first movie, Kiri ended up miraculously being born of Grace's inert avatar. This means that, while Kiri was raised by Jake and Neytiri, her real mother was Grace, and Weaver returned to the franchise to voice the teenage girl.
Not long after Grace Augustine's death, her dormant avatar was discovered to be pregnant, and Jake and Neytiri adopted the child when she was born. Kiri has an unusually strong connection with Eywa—more than even that of a tsahìk.
After their death, a deceased Na'vi's remains are laid to rest by their clan's traditional method. For example, while one clan may bury bodies under a tree, another clan lets their banshees eat their corpses.
The Sigourney Weaver Avatar: The Way of Water character isn't Dr. Grace Augustine from Avatar, as she died at the end of the first film. Instead, the 72-year-old actress plays a teenage Na'vi named Kiri, who is one of the adopted children of Jake and Neytiri.
The Avatar: The High Ground graphic novels provide plenty of backstory and information relevant to the story in Avatar: The Way of Water, including the reveal of who is Spider's mother. Paz Socorro is Spider's mom after a romantic relationship with Quaritch led to her getting pregnant.
Kiri was born in 2155 or 2156 through the avatar body of Grace Augustine, which was rendered brain-dead after Grace had passed away. Jake and Neytiri adopted Kiri after she was born.
To answer your first question, Augustine's human body perished, but her avatar body is only brain-dead. That's why her avatar body is comatose in a pod on Pandora.
At any time there is only a single Avatar, who is the spirit of the world incarnated into human form. When the Avatar dies, the Avatar Spirit is reincarnated into a newborn, who becomes the next Avatar. Each nation has a method of recognizing the new Avatar.
Grace was fascinated with how the Na'vi were connected to each other, Pandora, and Eywa. Now, Kiri, who is intrinsically connected to Grace, has a much deeper connection to the Na'vi deity than anyone else. Kiri can hear Eywa in a way no other Na'vi has been able to, not even the spiritual leaders.
Sigourney Weaver will return as Kiri Sully, Jake and Neytiri's adopted Na'vi daughter. Weaver also played the role of Kiri's mother, Dr. Augustine, in the first film. Sigourney Weaver will voice Kiri Sully for "Avatar 3," reprising the role from "Avatar: The Way of Water."
The Soul Tree is the heart of Eywa, the goddess that guides all of Pandora. Avatar: The Way of Water illustrates that Kiri has a special connection to Eywa, which means she can wield powers and feel her more deeply than other Na'vi.
In an interview with Collider's Perri Nemiroff, Weaver answered whether she knows the truth about Kiri's conception, to which she simply replied, “no.” In Avatar: The Way of Water, we learn that Kiri was born from Dr. Grace Augustine's Avatar, which somehow gives birth despite the apparent death of the doctor.
The seizure is believed to have been caused by frontal lobe epilepsy which could also cause the other symptoms Kiri has been having, including visions and the belief that she's hearing Eywa. However, the Metkayina clan believe it's down to something more spiritual and is a result of Kiri's connection to Eywa.
The Na'vi are monogamous creatures who mate (Na'vi name: muntxa si meaning "mate with, marry") for life. The mechanics of their reproduction are similar to that of humans and other Terran mammals. However, their unique physiology creates an experience fundamentally different from that of humans.
How Was Kiri Born? Kiri was born after Grace died following a mortal bullet wound given to her by Quaritch, with her then-empty avatar giving birth to the child despite not having any consciousness.
Lo'ak is old enough in Pandora to be a warrior and seems to be about 13 or 14 years old in Avatar: The Way of the Water given the time gap between Avatar and its sequel. It also appears that Neteyam and Lo'ak are close in age, so being a young 14-year-old would make sense.
