Mumzillia O'Chubbacutch, also known as Mumzy, was an aging bankvole who lived by a river. She had always wanted some children of her own, so when she found Flibber, Gurchen, and Guffy, she took them into her small dwelling and nursed Flib back to health, feeding her specialty soup. She also took care of all of the young ones that escaped from Althier until it was safe for them to return to their families. When the reign of the Sable Quean ended, she moved to Redwall Abbey to take care of the Dibbuns.