Anna Kwak, also known as Anna van de Polder, is the biological mother of Alfred Jodocus Kwak and the wife of Johan Sebastian Kwak. The family resides in a giant clog within a polder region. Forced to evacuate their home during a heavy rainstorm due to land development projects, Anna, Johan, and all their ducklings except the newborn Alfred are struck and killed by a speeding car while attempting to cross a large road to reach safety. This event leaves Alfred orphaned shortly after his birth, establishing Anna's role in his origin story as the survivor of familial tragedy.