Shyarly "Madam"

Madame Shyarly is a short fin mako shark mermaid and Arlong's little sister. She is a fortune teller living on Fishman Island and is also the proprietor of the Mermaid Cafe. Madame Shirley accurately predicted the dawning of the Great Age of Pirates,

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as well as the outcome of the Whitebeard War and Whitebeard's death.

First Appearance: Chapter 610/Episode 529 (Source: One Piece Wikia)