Wilhelmina is one of two stepsisters to the character portrayed by Hello Kitty. Alongside her sister, Fortella, she seethes with bitter envy over their stepsister's beauty. The two frequently scold their stepsister for her associations with animal friends and perpetuate a dynamic of mistreatment. Wilhelmina and Fortella often lie to their stepmother, falsely claiming their stepsister has been playing instead of working, which results in additional chores and reprimands for her. Their actions ensure a household where the stepsister is forced to handle all the labor while they go out to enjoy themselves. After the royal ball, Wilhelmina and her sister attempt to claim the prince by trying on the lost glass slipper, but their feet are too large. Following their stepsister's identification as the slipper's owner and her subsequent marriage, Wilhelmina and her family are punished for their actions and assigned to take over all the household chores they had previously forced upon their stepsister, including scrubbing floors and cleaning.