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All around the world, Sái (Saya , Sái ) is a common gender-neutral forename. The first name Sái is characteristic of Iraq, where it is quite a common largely girly, but uncommonly boy's name, Qatar, where it is quite a rare gender-neutral name, and Indonesia. Not in comparison with a country's population, it most frequently occurs in India, Indonesia, and Iraq. Also, Sái is the last name as well as the forename.
Sái is also a name for the fictitious and mythical characters: Saya Kaito , the fictional character from the 2017 video game Yandere School; Saya Otonashi , the protagonist in Blood+; Saya Kisaragi , the fictional titular character of Blood-C anime series co-created by studio Production I.G and manga artist group CLAMP and Saya , the fictional Japanese idol.