In Assassin's Creed II, who is Ezio Auditore's sister?

Ezio Auditore's sister in Assassin's Creed II is Claudia Auditore.

Claudia is part of the Auditore family of Florence and is introduced alongside her parents and brothers. Her family is torn apart early in the story after Ezio's father, Giovanni, and Ezio's brothers are executed as a result of a conspiracy. Ezio escapes Florence and begins the long process of discovering the people responsible while becoming an Assassin.

Claudia initially has a supporting role, but her importance increases as the story continues. In the later portions of the wider Ezio trilogy, she becomes closely connected with the management of the Brotherhood's activities. This makes her more than simply a background family member, although Ezio remains the central playable character.

Claudia is sometimes confused with Maria Auditore, who is Ezio's mother, or Cristina Vespucci, a Florentine woman associated with Ezio's personal life. Sofia Sartor belongs to a later period and appears in Assassin's Creed Revelations, not as Ezio's sister.