Miss Merry Christmas is a Baroque Works agent partnered with Mr. 4.

Unlike her partner, who is very slow, Miss Merry Christmas talks very fast. She has the power of the Mogu Mogu no Mi (モグモグの実, Mole Mole Fruit, called the "Diggy Diggy Fruit" in the English versions), a Zoan type fruit that gives her the ability to transform into a giant mole or a mole-human hybrid. Because of this transformation, she can easily dig underground in the sands of Alabasta, sneak up on opponents, and attack with her sharp digging claws.