They’re protection against the bloodsuckers
In the film, the wolf pack defends humans against vampires although they have a tribal history intricately entwined with Edward Cullen and his family. The wolf pack members will join Kristen Stewart, Robert Pattinson and fellow wolf pack member Taylor Lautner in the film directed by Chris Weitz which will be released domestically November 20th.
In the film Bella Swan (Kristen Stewart) is devastated by the abrupt departure of her vampire love, Edward Cullen (Robert Pattinson) but her spirit is rekindled by her growing friendship with the irresistible Jacob Black (Taylor Lautner). Suddenly she finds herself drawn into the world of the werewolves, ancestral enemies of the vampires, and finds her loyalties tested.
Each member of the wolf pack is of Native decent. Spencer is Lakota (Sioux), Pelletier is Cree-Metis, Meraz is Purepecha (Tarasco), Gordon is Hualapai, and Houseman, who was discovered at an open casting call, is Cree.
Casting of the wolf pack was overseen by award-winning casting director Rene Haynes who is well-known for her work on Native projects ranging from Dances with Wolves.
Source: Summit Entertainment