Claudia Auditore da Firenze

Claudia Auditore da Firenze is the sister of Ezio, Federico and Petruccio, and the daughter of Giovanni and Maria Auditore. It is evident that she has been too spoiled by Giovanni: she is smart and kind, but she is immature. She is portrayed by Devery Jacobs in both Assassin's Creed II and Assassin's Creed: Lineage, and is voiced by Angela Galuppo. She appears to be close to her brother Ezio.

Assassin's Creed: Lineage
Claudia Auditore is a young Florentine girl from a noble family living during the 15th Century in Italy: the Renaissance. She is the daughter of Giovanni Auditore, an Assassin, a "profession" of her father that she doesn't know.

Assassin's Creed II
After the tragic events that befell the Auditore family, Ezio vows to protect her, along with their mother, and escorts them both to the safety of the Villa Auditore. There, her uncle Mario puts her to work keeping a book of finances for the Villa; a task she finds positively scandalous, since it involves "work".

Trivia

 * Claudia is one of the few noticable people who appear not to age over the course of the game. She remains at the same desk in the Villa Auditore for 23 years. Her only interaction with Ezio is asking if he is "...[there] to look at the book" of finances.