|Relatives:||Sherman Grant (son)|
|Voiced by:||Lindsay Crouse|
Mrs. Grant was Sherman Grant's mother.
A single mother, Mrs. Grant was strict towards her only son. When Sherman was secretly hiding a weakened Batman in their basement, she asked what he was up to. He was able to convince her that he was just playing around. However, the later found the house a mess following an intrusion from the Penguin. She demanded an explanation from her son, but her anger was cut short when she saw Batman.