One Piece fans were stunned when Oda revealed how old Jewelry Bonney really is. The "Big Eater" pirate who devours pizza while battling Marines has been fooling everyone with her curvaceous adult form. With a high bounty and tough image, Bonney came across as an experienced pirate feared throughout the Grand Line.
Surprisingly, Bonney is actually just 12 years old in the present timeline. Behind that voluptuous figure and confident demeanor lies a young girl who uses her Toshi Toshi no Mi powers to age herself up. This revelation completely changes how fans view her interactions with other pirates and her place among the Worst Generation.
Her power to change age plays several roles in the One Piece story. She mostly uses this power to hide herself and avoid detection by the World Government. Her true form is that of a young girl, but she retains an adult appearance to navigate the dangerous world of piracy more effectively.

The disclosure of her exact age accounts for many of her childlike behaviors throughout the series. Her huge appetite, playful nature, and occasional tantrums now make ideal sense. These qualities align with her genuine personality as a 12-year-old child rather than the mature adult she seems to be in One Piece.
During her debut at Sabaody Archipelago, she was 10 years old but seemed like an adult woman via her Devil Fruit powers. The two-year timeskip that happens in One Piece aged her to 12 years old by the time of the Egghead Arc. That fact makes Bonney the youngest among the Worst Generation by far. Her fellow Supernovas are all adults, making her unique place even more phenomenal.
The Impact of Sapphire Scales Disease and Its Relationship with Kuma in One Piece

Bonney's childhood was severely affected by a rare condition called Sapphire Scales disease. This illness prevented her from leaving her home and socializing with other children normally. The disease also influenced her relationship with her adoptive father, Bartholomew Kuma, who desperately sought a cure for her condition.
The treatment for Sapphire Scales played a crucial role in shaping Bonney's current situation in One Piece. Kuma's deal with the World Government to secure her cure ultimately led to his transformation into a mindless cyborg. Despite not being biologically related, their bond is incredibly strong. Kuma raised Bonney from infancy after finding her with her deceased mother, Ginny.
He introduced her to the legend of Nika, which later connects to her interactions with Monkey D. Luffy. Things get more intense in the Egghead Arc when Bonney learns that Luffy is actually the new form of Nika.

Also, her inclusion alongside much older and more experienced pirates highlights her exceptional abilities and potential. Her 320 million berry bounty after the timeskip in One Piece shows how dangerous the World Government sees her. While she retains her childish nature, she also portrays exceptional maturity when faced with serious situations.
Final Thought
Bonney's true age of 12 years adds a complexity to her character in One Piece. Her ability to appear as an adult while maintaining the heart of a child forms fascinating dynamics with other characters.
The discovery of her exact age also underscores the tragic factors of her story. A 12-year-old girl handling the weight of her father's sacrifice and steering the dangerous world of piracy builds a tantalizing narrative.