Bast

Bast or Bastet is the Egyptian goddess of felines, sunlight and moonlight. In the Kane Chronicles, she is disguised as Muffin, Sadie's cat. Bast is the daughter of Ra.

The Red Pyramid
Before the book starts, Bast was imprisoned in Cleopatra's Needle with Apophis. She was released by Ruby and Julius Kane. Bast offered to host Ruby, who was already hosting Isis, but Ruby refused and eventually burned out. Bast owed Ruby her freedom, so she promised Julius that she would protect Sadie. Bast took the host in a cat named Muffin and stayed with Sadie for six years. After the five gods (Isis, Horus, Set, Nephthys, and Osiris) were released, Bast (in Muffin-form) traveled with Sadie and Carter to the Twenty First Nome. After an attack by the Long-Necks, Bast revealed herself to Sadie and Carter as Bast. She helped them travel to Phoenix, but was eventually killed by Sobek. During this, she gave up Muffin as a host to spare her. Bast came back from the Duat at the end of the book by a favor from the gods and became Sadie and Carter's "guardian."

Appearance
Bast has yellow, catlike eyes and always wears a tight leopard suit. She also keeps 2 knives which she uses whenever in battle.

Personality
Bast is a fierce and strong fighter, as she is the one who battle the snake Apophis for centuries while imprisoned in the Duat. In spite of her powerful nature, she is still loving and fun, which helps her get along with Sadie and Carter. She cares so much about the kids to the point of sacrificing herself of them, and often blames herself for not being able to help them. However, she later reveals that she is not entirely brave, as she sometimes runs away when she is surprised (happens during her meeting with Anubis) or when she meets her natural enemy.