Deer girl is a spirit in Native American mythology whose associations and qualities vary, depending on situation and relationships. To women, children, and men who are respectful of women and children, she is associated with fertility and love. However, to those who have harmed women and children, she is vengeful and murderous, and known to lure these men to their deaths. She appears as either a beautiful young woman with deer feet, or antlers.
Truth be known, the Deer Girl is actually a genetic experiment done by the "Grays" hundreds of years ago, and released to roam the earth. Even aliens like to have a little fun every now and then.