Sly Cooper, the thief, is the eponymous protagonist of the Sly Cooper series. He is a male raccoon with gray fur and brown eyes that is best friends with Bentley and Murray, who are also members of his gang. He has a complicated romantic relationship with Inspector Carmelita Fox, who was his partner when he worked for INTERPOL after faking amnesia. He is currently stuck in ancient Egypt.
Sly first appeared in Sly Cooper and the Thievius Raccoonus at the age of eighteen. His current age is unknown, as he was 21 in Sly 3: Honor Among Thieves, but an undisclosed amount of time passed between that and the fourth game. He was born to his mother and father, Conner Cooper, in 1984.
He was voiced by Kevin Miller in all of his video game appearances.
Sly was born into the lineage of the Coopers under the tutelage of his father, Conner Cooper. Between the jobs that his father's gang would pull off, Sly would spend time with Jim McSweeney, a member of the gang and Conner's friend. At the age of three, Sly was taken by his father to a museum on the Ligurian coast in Italy where they met up with McSweeney, who then took the map to the Cooper Vault—an island-wide safe that holds the riches of the entire Cooper clan—and hid it in the museum.
As Sly grew up, he learned about his family's history as master thieves. He was to follow in their footsteps and inherit their legacy, a book called the "Thievius Raccoonus," at the age of eight. On the night Sly was to inherit the book, a mysterious gang of criminals known as the Fiendish Five infiltrated the Cooper home. Try as he might, Conner failed to defend himself, his wife and his son from the gang, resulting in the death of both parents. The Fiendish Five ransacked the house in search of the Thievius Raccoonus as Sly watched helplessly from the closet. After the gang found the book, they tore it into five parts before leaving. Sly, now an orphan, was placed in an orphanage, where he met his now lifelong friends, Bentley and Murray. With their encouragement, Sly was determined to live up to his namesake as an accomplished thief.
As children, the trio planned to steal the orphanage's cookie jar from Mrs. Puffin, the director of the orphanage, who kept the children's holiday cookies for herself. This desire came from the fact that "she was so nasty" and that Murray would spend sleepless nights thinking about the cookies. They started to strategize and gave themselves a name; the Coopers 3.
After much plotting, Bentley had come up with the perfect plan: Sly would hide in Puffin's trash bin until after she had left for the night and would swipe the cookies then. According to his calculations, Bentley decided they had only five minutes between Puffin's departure and the janitor's arrival. Unfortunately, Sly had misinterpreted Bentley's instructions and was nearly caught by the janitor. Due to Murray's quick thinking, Sly was yanked through the window at the last second before the janitor entered the office. However, the mission was not a failure: Sly had stashed the cookies in his hat at the last moment. After their first successful heist, the Cooper Gang was born.
Years later, Sly arrived in Paris "looking for a little adventure" when he came across the Paris Opera House. While comparing stories with INTERPOL Inspector Carmelita Fox some time later, the accounts differ, so the exact details are impossible to know. Sly claimed he was just there to "soak in the architecture" while Carmelita stated that he was there to "case the joint." In the end, Sly helped catch a rival thief, the stage manager Pierre, which benefited Carmelita and started the two's relationship.
Some time later, Sly stole the Fire Stone of India, which put Carmelita after him again. He planned to give it to Carmelita as a token of his feelings for her.