Cleo

Cleo, is a magician from Rio de Janeiro..."Yes, Cleo from Rio"... She is currently studying under the Kane siblings and is in charge of their libary, being an avid reader.

Throne of Fire

 * She participated in the Battle of Brooklyn House, chanting incantations such as "Blind!", "Horizontal!", and "Gassy!" at the attackers. She is described as a bookworm but her actions in the Battle of Brooklyn House proves she is just as brave as the others. Sadie makes a joke about her name saying " Cleo from Rio".

The Serpent's Shadow

 * Cleo appears briefly near the start of the book, later appearing in the Battle at the First Nome. She battles one of the magicians, with her arm being transfigured into a sunflower, and she manages to defeat her opponent by casting a spell on them, changing them into a David Copperfield Book (which Carter thought to be hilarious).

Personality
She has no stomach for battle; she maintains and constantly organizes the library at Brooklyn House (with help from the shabti). She isn't really brave. She has a strong relationship with Khufu, the baboon.