Dora Winifred Read (Theo's sister)

Dora Winifred Read is the deceased sister of Theodore Read and Thora's father. She is seen in a photograph in the special "The Rhythm and Roots of Arthur," when D.W. learns that she is named after her and behaves quite similarly as well. According to Theo, "she was only a year older but she was the boss." She cooked with David a lot, and taught him how to roast a chicken. She died before D.W. was born.