Jake and Neytiri’s youngest daughter in Avatar: Fire and Ash is called Tuk. Her full Na’vi name is Tuktirey, while “Tuk” is the short name used by her family and friends.
Tuk is the youngest child of Jake Sully and Neytiri. She is the younger sister of Lo’ak and Neteyam and the younger adopted sister of Kiri. Her character was introduced in Avatar: The Way of Water, where she is portrayed as adventurous, energetic, and eager to keep up with her older siblings despite her age.
The role is played by Trinity Jo-Li Bliss. Tuk is easy to confuse with Kiri, another daughter in the Sully household, but Kiri is the adopted daughter of Jake and Neytiri and is connected to Dr. Grace Augustine’s avatar. Tsireya is instead Tonowari and Ronal’s daughter, while Ronal is the Metkayina spiritual leader and Tonowari’s wife.