The Duchess of Nuts is a character on Adventure Time. She is married to the Duke of Nuts and has two children who are the Marquis of Nuts and a Second Son that appeared in "Henchman." She first appeared in the episode "The Duke," where Finn and Jake confronted her about the Duke of Nuts. She had known about his "crimes" (that Finn really committed) and had a odd state of mind when talking about it. She made her second (and last) appearance in "Henchman," when Marceline comes to sing and play her Axe Bass for the Duchess' second son's birthday.
She is larger then the Duke of Nuts and wears a brown dress with a striped-light pink shirt under.