Blue Birds by Caroline Starr Rose

Alis and her parents make the long journey from England to settle the New World. But it doesn't go as planned and Alis, her parents, and the others of their small community soon find themselves at odds with the Roanoke tribe. As tensions rise between the settlers and the Native peoples, twelve-year-old Alis forms an impossible friendship with a Roanoke named Kimi. Despite language barriers, the two become as close as sisters, risking their lives for one another until Alis makes a decision that will change her life forever.