Mocha

Mocha is a girl who was held captive on Punk Hazard.[1] She was freed with the rest of the children by the Straw Hat Pirates.

A photo of Mocha from before she was kidnapped.
Mocha is much larger than an average little girl because of the experiments done to her. She has a large head that is not very proportionate to her body, big purple eyes, and wavy, unkempt, black hair.[1] She wore a white colored sleeveless dress during her time in the Biscuits Room and a coat outside when Kin'emon gave them all warm clothes.[2]
In a photograph from before she was kidnapped, Mocha can be seen at a normal size and wearing a dress with a flower pattern and a backpack.