Claudia Auditore da Firenze

Claudia Auditore da Firenze (born 1461) is the sister of Ezio, Federico and Petruccio, the daughter of Giovanni and Maria Auditore, and the niece of Mario Auditore.

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
The day following Ezio's brawl with Vieri de' Pazzi's men, Claudia met with him feeling sad and depressed. She suspected her boyfriend Duccio, of being unfaithful. Ezio convinced her that Duccio was not the one for her and went on to confront him for Claudia.

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."

In the official novel 'Assassin's Creed: Renaissance,' Claudia went with Maria to a convent in Monteriggioni for a short time, and took her vows as a noviziata, or novice sister. However, she soon relocated to the Auditore villa and was later married to Mario's "senior captain." She was later pregnant with the Captain's child. This could further add that regardless of gender, it may be the new assassin in Assasin's Creed III.

Characteristics and personality
It is evident that she has been too spoiled by Giovanni, unafraid to be violent when a girl “looked at her boyfriend,” and at times immature, such as when Mario assigned her to manage the Auditore Villa's finances. Regardless, Claudia is very capable of handling and keeping track of the town’s bankroll and her brother's purchases and earnings. She is also kind with her family, being especially emotional over her father and brothers' execution, and her mother’s emotional trauma.

Trivia

 * Claudia is one of the few noticeable 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. After she complains about being put to work, her only interaction with Ezio is asking if he is "... [there] to look at the book" of finances.
 * Due to her violent streak, Giovanni had to raise her dowry by 1000 florins because she scared off all of her suitors.
 * She is Ezio's only sister, and unlike her brothers that were executed in order for Rodrigo Borgia to prove a point to Ezio, she was spared, likely because of her gender.
 * When you start earning income from Monteriggioni, Claudia states she will keep any money past the chest's maximum capacity (based on your collectibles and renovations to Monteriggioni), with no explanation of what she intends to do with all that money.