- "There's someone missing over a year ago. Charlie's doing what he can, but..."
Mrs. Biers is Riley Biers's mother.
Mrs. Biers and her husband had three children; one girl and two boys while living in several places in the Southwest and along the Pacific coast during her children's childhood and adolescence. Riley, her middle child, was at the end of his freshman year at Oregon State University when Victoria turned him into a vampire. He never went back to visit his family.
Mrs Biers makes a brief appearance with her husband at the beginning of the Eclipse movie where they converse with Charlie Swan about Riley's disappearance. In the movie, her family lives in Forks, Washington; since her son disappeared over one year ago, they had been putting up flyers to look for him.
- Her existence in the novel is mentioned in The Twilight Saga: The Official Illustrated Guide.