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Jewelry Bonney, also known as the "Big Eater", is a pirate from the South Blue and the captain of the Bonney Pirates. She is one of twelve pirates who are referred to as the "Worst Generation".

One Piece

One Piece is a Japanese manga series written and illustrated by Eiichiro Oda. It has been serialized in Shueisha's shōnen manga magazine Weekly Shōnen Jump since July 1997, with its individual chapters compiled into 107 tankōbon volumes as of November 2023. The story follows the adventures of Monkey D. Luffy and his crew, the Straw Hat Pirates, where he explores the Grand Line in search of the mythical treasure known as the "One Piece" in order to become the next King of the Pirates. (from Wikipedia)

Jewelry Bonney is the daughter of Ginny and the adopted daughter of Bartholomew Kuma, the former King of the Sorbet Kingdom (making her Sorbet's former princess). Bonney lived inside Kuma's church throughout her childhood due to a rare disease known as Sapphire Scales that she inherited from her mother. After Kuma sacrificed his body to the World Government in exchange for curing Bonney, she ventured forth from her home to become a pirate in search of her father.

Thanks to experiments conducted by Jaygarcia Saturn of the Five Elders, Bonney inherited the powers of the Toshi Toshi no Mi, which allows her to manipulate the age of herself and others at will. Although she typically uses her ability to appear as a young woman in her twenties, Bonney is in fact still a little girl, having been ten years old during her debut and now being twelve after the timeskip. (from Fandom One Piece Wiki)