|Relatives:||Mike McSweeney (father)|
|Voiced by:||Rachel Davey|
Mary McSweeney was a little Gotham girl. She was the daughter of notorious criminal Mike McSweeney aka Mad Dog McSweeney.
Three months before Christmas, Mary's father, Mike, was arrested and sent to State Penitentiary. Little Mary wanted nothing other than to see her father home for Christmas, and asked Santa precisely that. He gave her some cash so she could buy her father a present.