Chimney

Chimney (チムニー Chimunī) is the hyperactive granddaughter of Sea Train conductor Kokoro, and owner of the rabbit, Gonbe (which she thinks it's a cat).

History
She takes a liking to the Straw Hat Pirates instantly when the crew meets her outside of Water 7. She also tends to notice things that others cannot, such as when she spotted Monkey D. Luffy wedged between two buildings (which is where he landed after Rob Lucci knocked him out of Galley-La Company Headquarters).

She, along with Gonbe, later sneak aboard the prototype Sea Train, Rocket Man. She accompanies the Straw Hats, Franky Family, and Galley-La foremen to Enies Lobby. Chimney later follows Rob Lucci, Spandam and Nico Robin. She also discovers the entrance they took which she later shows Luffy. Rob Lucci reveals that he knew she was following them. He chose not to do anything because he wasn't ordered to.

Trivia

 * She is 1/4 Mermaid and 3/4 human. Kokoro married a human. They had a 1/2 Mermaid son, who then married another human. Although she retains none of her grandmother's heritage, she is a extremely good swimmer. She also holds on to Kokoro's habit of constantly smiling, even in dire situations.
 * She was present with Luffy the first time he used Gear Third.
 * Her coloring scheme from the original manga and the anime are different.