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New creatures

Medusoids: Giant bioluminescent jellyfish-like creatures used by the Wind Traders as "balloons" for their ships. They produce hydrogen to float through the skies.
Windrays: Squid-like creatures that serve as "pilots" or pullers for the Wind Traders' airships.

People and organization of RDA

Humans once again take on the role of colonizers, but their camp is not as homogeneous as it might seem. Key human characters:

General Frances Ardmore: Commander of the RDA security forces on Pandoria. She is the chief military strategist and leader of the planet's recapture operations, possessing extensive experience and influence.
Colonel Miles Quaritch: His consciousness, uploaded into an avatar body, continues to haunt Jake Sully. In this film, he allies with the Varang and her Mangkwan clan, making him an even more dangerous enemy.
Dr. Ian Garvin: A marine biologist working for the RDA. However, he is depicted as a "scientist disillusioned with the RDA," and is the one who helps Neytiri rescue Jake, indicating his defection to the protagonists.
· Captain Mick Scoresby: A ruthless whaler who continues to hunt the Tulcun, representing the most brutal and selfish side of the human presence on Pandora.
· Dr. Norm Spellman: A human scientist and longtime ally of the Na'vi who remained on Pandora after the RDA's expulsion.
· Other People: Other confirmed characters include Parker Selfridge (RDA Administrator), Dr. Carina Mog (played by Michelle Yeoh), and possibly Dr. Grace Augustine (in connection with Kiri's arc).

New and Returning Na'vi Characters

Varang: The main antagonist and leader of the Mangkwan clan. She is both the chieftain (Olo'eyktan) and spiritual leader (Tsahìk) of her people. Described as "rival and hostile," yet "incredibly real," she is willing to do anything for her tribe.

Peylak: The chieftain (Olo'eyktan) of the peaceful Wind Traders. He and his clan play a crucial role in the Sully family's journey, but spoilers suggest Peylak may die in an attack by the Ash People early in the film.

Ronal and Tonowari: The leaders of the Metkayina clan return and continue to play a significant role. · Tsireya: Daughter of Ronal and Tonouari, close friend of Lo'ak.

Characters (Na'vi and their allies)

The Sully Family

Jake Sully: The protagonist, a former Marine who became the leader of the Na'vi. After the loss of his eldest son, he tries to protect his family from new threats.
Neytiri: The warrior spirit of the family, Jake's wife. She still mourns the loss of her son and is willing to do anything to protect her loved ones.
Kiri: Jake and Neytiri's adopted daughter, who has a deep, mystical connection to Eywa. Her origin (connection to Grace Augustine) remains an important plot point.
Lo'ak: The second son, who may serve as the narrator of this film, inheriting that role from his father. He feels guilty for the events of the past.
Tuk: The youngest daughter in the Sully family.
Spider: A human raised among the Na'vi. His biological father is Colonel Quaritch. In this storyline, he gains the ability to breathe Pandora's atmosphere without a mask, making him a key figure for both sides of the conflict.

Clans and Peoples of Pandora

The third film centers on two new clans, radically different from the established Omaticaya and Metkayina:

Mangkwan Clan, or Ash People: This aggressive and warlike clan lives in the harsh conditions of a volcanic wasteland ("Ash Village"). Their lands were devastated by a volcanic eruption, and, unable to find protection from Eywa, they renounced it. The Mangkwan see fire as the only pure force, and consider death and violence to be purifying. Their leader is Warang.
Tlalim Clan, or Wind Traders: The complete opposite of the Mangkwan, they are a peaceful nomadic people who ply the skies of Pandora in enormous gondola ships. Their philosophy is based on symbiosis with the creatures of the air and neutrality in conflicts. The clan leader is Peilak.
· Returning Clans:
· Metkayina: A water clan that reappears in the film. Sally's family still lives among them, and leaders Tonowari and Ronal continue to play important roles.
· Omatikaya: A forest clan, Neytiri's home clan, whose traditions and connection to Eywa serve as a spiritual guide for other peoples.