Neytiri's sister, Sylwanin, got together with other Omaticaya and attacked an RDA bulldozer. When RDA soldiers threatened to attack them, they fled to Grace's school in need of protection. They believed Grace could help them because she was also a human. They arrived to late, and Grace tried to evacuaqte as many Na'vi as possible. Sylwanin, along with many others, were killed by the RDA, which is believed to have started the rivalry between the humans and the Na'vi.