Gwendolyn "Gwen" Piper (formely Cromell) is a tertiary heroine in the Disney live-action series Halloweentown. The daughter of witch Aggie Cromwell and the mother of the children Marnie, Dylan, and Sophie, Gwen once had estranged bonds with her mother, wanting to ensure that her children would abandon sorcery and witch-craft and live a normal life. Due to certain circumstances, she became involved in an adventure to Halloweentown, a realm inhabited by demons and witches, in order to save her family from the threat of a demon. Over the progress of the original series, Gwen became much more accepting of magic, and let her children embrace their magical heritage while helping to set restraints. She eventually fought the demon, who was no one else than her ex-lover and mayor of Halloweentown, Kalabar, along with her family saving the realm from his threat.
Regarding the villain wars, Gwen appears as a supporting character in the second Disney Heroes vs. Villains, providing moral support to her family in the conflict against the villains.