| Sydney Bristow | |
|---|---|
| Alias character | |
 Jennifer Garner as Sydney Bristow | |
| First appearance | "Truth Be Told" (episode 1.01) |
| Last appearance | "All the Time in the World" (episode 5.17) |
| Portrayed by | Jennifer Garner |
| In-universe information | |
| Alias | Kate Jones Joanna Kelly Julia Thorne Bluebird Freelancer Mountaineer Phoenix Amy Tippin Anna Espinosa |
| Gender | Female |
| Title | Agent Sydney Bristow |
| Occupation | SD-6 field agent CIA field agent The Covenant assassin (DSR double agent) APO field agent |
| Spouse | Michael Vaughn (husband) |
| Significant other | Danny Hecht (ex-fiancé, deceased) Noah Hicks (ex-boyfriend, deceased) Simon Walker (lover, deceased) |
| Children | Isabelle Vaughn (daughter) Jack Vaughn (son) |
| Relatives | Jack Bristow (father, deceased) Irina Derevko (mother, deceased) Elena Derevko (aunt, deceased) Katya Derevko (aunt, status unknown) Nadia Santos (maternal half-sister, deceased) |
| Nationality | American |
Sydney Anne Bristow (played by Jennifer Garner) is a fictional character and the protagonist of the television series Alias. She is an American woman with a Russian-Canadian family background who thought she was working as a spy for the CIA when, in fact, she was one of the operatives working for a criminal organization known as SD-6 — one of the arms of the terrorist group The Alliance of Twelve. Eventually, Sydney learns the truth about her employers and becomes herself a spy for the CIA.
Sydney is depicted in the series as being strong both physically and emotionally. She deals with some significant trauma over the years: the death of her fiancé, the death of her best friend, the realization that her mother was a former KGB spy, the estrangement of many of her friends and the constant activity and changes that she must endure from being a spy on a regular basis. Sydney is highly skilled in Krav Maga and is a hyper polyglot, speaking English, Russian, German, Greek, Dutch, French, Italian, Spanish, Portuguese, Norwegian, Swedish, Romanian, Hungarian, Hebrew, Uzbek, Arabic, Persian, Urdu, Indonesian, Cantonese, Mandarin, Japanese, Korean, Hindi, Vietnamese, Polish, Serbian, Czech, Ukrainian, and Bulgarian in various episodes. Throughout the series her code names are Bluebird, Freelancer, Mountaineer, and Phoenix.