Druscilla Porter is the 7-year-old granddaughter of Mrs. Porter. She attends Stoneybrook Day School in the 2nd grade. Her parents are divorcing and her mother has custody of Druscilla. Druscilla stays with her grandma for some time.
Druscilla is described as having black, thick, messed-up hair, small red-rimmed eyes, and pale skin. She is taking flute lessons at school. She founded the Krusher Quartet (which is later renamed as Druscilla and the Dynamos). She is good friends with Melody Korman. She wants to be included by the other kids.