Drumstick's Mother is a minor character mentioned in File Under: 13 Suspicious Incidents, in the seventh incident, "Violent Butcher."
Drumstick's Mother lived in Stain'd-by-the-Sea for at least a part of her life. She and Mack both worked as butchers, though he notes she was not as good with venison. The two of them had a son, Drumstick.
She later left her husband and moved into The City for work. Mack was abusive towards Drumstick, so he earned money repairing women's shoes and ran away to the train station in hopes of moving in with her in the city.