Apis

Apis (アピス, Apisu) is a young girl who lives on Warship Island. Her grandfather's name is Bokuden. She is a brave child who tries her hardest to protect her friend, Ryu.

Devil Fruit
She ate the Hiso Hiso no Mi (called the Whisper-Whisper Fruit in the FUNimation Dub and 4kids version) giving her the ability to telepathically communicate with or allowing her to understand the heart of animals.

History
She tried to guard the Thousand Year Dragon Ryu from the Marines on her own, but she was captured by Commodore Nelson.

The Straw Hat Pirates helped her out when she ran away from the marines, taking care of her and aiding her during her journey. After many struggles, she managed to find the Lost Island and was able to fulfill her duty of taking Ryuuji back to the island.

When offered to join the crew she declines and says that she wants to stay and protect the island. Her last appearance was of her running away in terror when her grandfather was about to begin explaining to her the history of her ancestors due to her grandfather's way of telling stories (long and boring).