Skypiean Race, One Piece New World Wiki

Skypieans are the race that settled on Angel Island as well as other islands in the sky. They are a mostly friendly folk who try to maintain a comfortable lifestyle. They have a knack for inventing devices that improve their daily comforts, such as Wavers, Dial Boat and harnessing Dials for everyday use, such as cooking, cleaning and entertainment. They greet each other by saying 'Heso' (which is Japanese for bellybutton) often while putting their hand against their head and sticking two fingers

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