Sayu is a cute playable Anemo character in the Genshin Impact game. She is a ninja from the Shuumatsuban who wants to be taller. Sayu really believes that sleeping can help her growth, which is why she prefers to use her ninja techniques to hide and laze around. And that's the reason why she is sleeping in fanart Genshin Impact Sayu With Pillow Sticker.