In Egyptian mythology, Shu is one of the primordial sky gods and one of the Ennead. He was created by Atum (Ra) from his semen or mucus. With his sister, Tefnut, he was the father of Nuit and Seb. His daughter, Nuit, was the sky goddess whom he held over the Earth (Seb), separating the two.
Tefnut and Shu once argued, and she left Egypt. Shu quickly decided he missed her, but she changed into a cat that destroyed any man or god that approached. Thoth, disguised, eventually succeeded in convincing her to return.