Shārotto Purimu Charlotte Prim is the 20th daughter and 46th child of the Charlotte Family, the older twin sister of Praline, and an octopus  mermaid- human hybrid. She is also an  officer of the Big Mom Pirates.
She was also a member of
Charlotte Oven's army to ambush Monkey D. Luffy on Cacao Island.
Prim's original concept art.
Prim is a woman who has tan skin and blue eyes. As a half-octopus mermaid, the lower part of Prim's body consists of eight pink octopus legs. Above her legs, she wears a low-cut dark red dress, and her light blonde hair is fashioned into a cylindrical shape at the front.
Prim appears to be loyal to her family and crew, as shown when she took up Oven's call to gather on Cacao Island and attack Luffy.
As an officer of the
Big Mom Pirates, Prim has authority over lower-ranking members of her crew. She is strong enough to have been sent with many of her siblings to  Cacao Island to fight Monkey D. Luffy.
As a half-mermaid, Prim is likely able to breathe underwater, communicate with fish, and swim with exceptional speed, as well as being able to use her tentacles to immobilize an opponent.
Prim carries a trident, but has not been seen using it in battle.
Prim gathered with thousands of her crewmates on
Cacao Island as part of Charlotte Oven's effort to ambush Monkey D. Luffy. She and the army waited for Luffy to emerge at 1 AM. After  Pekoms was attacked by Oven after exiting the Mirro-World, she exclaimed in shock upon seeing Luffy. After the Straw Hats escaped, Prim,  Brownie, and Joconde cheered as Big Mom joined the battle.