Describe Marie's little soldier's origin, looks and personality

Marie is the Native American woman working for David’s family. She was hired to work in the house but also to take care of David when he was a young boy. Marie is presented to the reader through David’s eyes and thus the reader is told that Marie was loved by his family despite the racial views existing then. Marie lives in the same house as David and when she gets sick, she is treated by Frank, Wesley’s brother. His presence makes Marie want to reveal his crimes, and Marie tells Gail about everything that Frank has done. Because of this, it is implied that Frank murders Marie.