Nephthys is said to protect the deceased in spell 151b of the Book of the Dead, she is described as the east wind in 161T1. She is listed as one of the nine gods of the Ennead. She is often shown at the head of the deceased while her sister, Isis, is at the foot.
EC425 Nephthys on a New Kingdom coffin fragment
W649 Nephthys hovering over the deceased