Delia is the housekeeper for the Hood Family. Dr. Hood mentions that she has been with the family since before Darla was born, and has acted like a mother to her after Mrs. Hood's death, which would be sometime after Men In Fright (October 1938) when Darla's mother is last seen and continues on to Wedding Worries (December 1941) when her father remarries a second time. She's a witness to the gang's shenanigans to break up the wedding.