Dowager Hatt is Sir Topham Hatt and Sir Lowham Hatt's mother, Stephen and Bridget Hatt's great-grandmother, and Lady Hatt's mother-in-law. She owns a Dalmatian, which she renamed Gremlin after her adventure with Gordon's "gremlins". She is a bit of a thrill-seeker and hates going slow and resting.
During her youth, she used to be a very good opera singer. Though her son does not like hearing it.
Dowager Hatt lives near Maithwaite.