For one, even if Neytiri is 18 in human years, she's the Na'vi equivalent of a human in their early-to-mid-twenties. This is proven in three different ways: James Cameron has stated that Jake's avatar body is around 17 human years old.
Although lifespan data is incomplete, it is estimated Na'vi live 30% longer than the average human. Once born, Na'vi children mature more rapidly than humans, reaching mental, physical, and cultural adulthood between the ages of 15 - 17 Terran years.
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.
Neteyam te Suli Tsyeyk'itan was Jake Sully and Neytiri's eldest son at 15-years-old. He is the eldest brother of Lo'ak, Tuktirey and Kiri. As the eldest brother, Neteyam was expected to watch out for his younger siblings and their antics.
Neteyam was only 15 years old when he died during the climax of Avatar 2. He and his younger, more reckless brother Lo'ak were determined to save their symbolic brother Spider, the biological son of the antagonist Miles Quaritch.
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.
Kiri's backstory is a little more complicated, as she was gestated in Dr. Grace's avatar. However, it can be surmised that Kiri is around the same age as Lo'ak, making her either 13 or 14 years old. Tuktirey, or Tuk for short, is much harder to guess as there are really no clues given.
Kiri is a young Na-vi around fourteen years of age. Since she was conceived through an avatar body (a genetically engineered human/Na'vi-hybrid body, designed to serve as a remotely controlled vessel for a human mind) she was born with human-like traits, such as eyebrows and five fingers instead of four.
Spider's Mother Is Paz Socorro (Revealed In Avatar Comics)
It has been confirmed through Avatar comics that Spider's mother is Paz Socorro. While Avatar: The Way of Water takes place a decade after the first movie, James Cameron's original sequel script did not have as big of a time jump.
However, even if the movie never mentions this fact directly, sharp-eyed fans might notice Neteyam only has four fingers, making him stand apart from his siblings. And ever since we saw this strange detail, we cannot help but wonder why Cameron would hide Neteyam's four fingers in plain sight.
“We're into a very hectic two years of post-production right now,” Cameron told Campbell about the third film in his decades-spanning franchise. “So it will be Christmas of 2025.”
Reproduction. Reproduction mechanics (e.g. physical coupling) are similar to humans and other Terran mammals. The females carry the growing fetus just as humans do, in their womb. The gestational period isn't known, nor the birthing process.
NEYTIRI IS A BEAUTIFUL NA'VI PRINCESS WITH IRIDESCENT BLUE SKIN, FELINE FEATURES AND HUMAN LIKE INTELLIGENCE. At three metres tall, she is long and lithe with the strength of three men.
The Na'vi people taller than humans because of the low gravity of Pandora. Additionally, the Na'vi people have only four fingers while the Avatars have 5 fingers.
Kiri is the inquisitive and intelligent adopted daughter of Jake Sully and Neytiri. 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.
Her biological father, if she even has one, remains unknown. Because Grace had an avatar body, Kiri possesses human-like traits such as her eyebrows and five fingers on her hands. She also lacks the elongated canines common amongst the Na'vi.
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.
Okay so during the events of Avatar 2 , Neteyam is 15, Kiri is around 14-15 as she was born between 2155-2156, and Lo'ak is 14. That means that she's perfectly between the two brothers, so in the scenes where Kiri and Lo'ak are arguing, they're going to look close in age because they're less than a year apart.
Lo'ak te Suli Tsyeyk'itan is the fourteen-year-old son of Jake Sully and Neytiri, the younger brother of Neteyam, the older brother of his only biological youngest sister, Tuktirey, and the younger adoptive brother of Kiri.
Spider thus exists in a nebulous space when it comes to his identity. He's the offspring of the worst of mankind and wishes to resist his background, yet he cannot completely participate in the culture he admires and, in the case of his crush on Kiri, adores.
Unless that theory is true, Grace was impregnated by someone. Kiri's brothers joke that the scientist Norm could be her father. The movie does not reveal much information about the birth of Kiri. It is unclear whether Kiri was conceived before Grace died and her avatar carried her to term.
The eldest child of Neytiri and Jake Sully, Neteyam te Suli Tsyeyk'itan is a natural athlete. Noble like his father, he is favored by the clan for his strong and confident demeanor. He cares greatly for his siblings, often being asked to look after them while his parents are gone.
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.
