Isis

Isis is the Egyptian goddess of magic and motherhood who was born during the fourth of the Demon Days. Her parents are Geb and Nut while her siblings in her first life were Horus, Osiris, Nephthys, and Set. In another life, Isis was reborn as Osiris' wife and Horus' mother.

Background
Isis was born as a result of the union between Geb and Nut and eventually married her once-brother, Osiris. She craved for her husband to become king of the gods and poisoned the current king, Ra, but feigned innocence. As he grew close to death, Isis told him she could heal him if she had his secret name. Desperate, he agreed, but Isis also gained control over Ra. After healing Ra, Isis forced him to leave the Earth, allowing Osiris to take his place as king.

This ultimately resulted in the ancient clash between Osiris and Set, who had been Ra's faithful lieutenant. Osiris was eventually tricked by Set and Isis, still pregnant with Horus, was forced to go on the run. She gave birth to Horus while hiding from Set and Horus eventually sought revenge for his father. Although Horus was successful, he did chop off his mother's head when she attempted to stop him from attacking while still weak; she was healed by Thoth.

The Red Pyramid
After being released from the Rosetta Stone, Isis takes Sadie Kane as a host. She keeps her presence hidden from Sadie for some time, but does boost and develop her magical abilities to a degree greater than they should be. Once Sadie becomes aware of Isis's presence, Isis begins to try to convince Sadie to let her take control, but Sadie remains stubborn and refuses. Throughout Sadie's quest to stop Set, Isis offers advice and information and during their final battle with Set, the pair work as one, forming a deep bond while doing so. Despite this, Sadie asks Isis to leave her, although Isis leaves some of her essence in Sadie's amulet.

The Throne of Fire
Isis's voice often appears to Sadie, offering her hints or helpful information. When Ra is returned to the heavens, Isis is a bit disappointed that her son Horus cannot continue to rule over the gods. Because of Sadie's role in this, she treats her a bit coldly, but is more polite to her than Horus is to Carter.

Personality
Isis is, as Thoth described her, deceitful and manipulative; she yearns for power and often becomes impatient with Sadie for not allowing her to take control of their shared body. Despite this, Isis also has a motherly side; although she mainly shows this to Horus and Anubis, she also allows Sadie to see the more caring aspect of her personality.

Appearance
Carter and Sadie both describe Isis as having their mother's face, but she does not seem to share Ruby's coloring. She is distinguished by 'wings of light'. She has dark hair and brown eyes.

Powers and Abilities
Isis has all the standard abilities of a god, but she possesses even greater magical abilities. She is adept at both healing and creating poisons. While in a host, she is capable of turning into a kite.

Relationships
Osiris: Isis is fiercely loyal to her husband, even to the point that she will resort to underhanded methods to help him become the greatest of the gods. Their love seems to be genuine and Isis was devastated when Osiris was destroyed by Set, however temporarily.

Sadie Kane: Although Isis would often try to convince Sadie to relinquish control to her, Isis has great respect for her former host, admitting that Sadie was wise for a mortal and giving her gifts once Set was defeated.

In Mythology
The ancient Egyptians called her, "She Who Knows the Names". In order to cast a spell or curse on someone, their secret name has to be known. When a child was born the mother would give a child two names - one the child was known by and one only the mother and Isis knew.

Trivia
Isis was called "She who knows the names," and may have known Set's secret name, but was unable to tell Sadie because the secret name can only come from the mouth of the god or from the person closet to him. In Set's case, this is Nepthys.