Info Sydney Savage:
Sydney Savage used to work for Australian Special Ops before she was recruited by Deuce to join his international team of female agents, Danger Girl. She has a reputation for being both fearless and reckless. It took her a little while to warm to the team's newest recruit, Abbey Chase, though they are good friends now.

Sydney is originally from Australia, though very little of her background has been revealed. She was a member of the Australian S.A.S. She has an extensive if mostly unexplained relationship with Johnny Barracuda. Also it is eventually revealed that she has a sister Sonya, although before her introduction she made no reference to her. She later decides to buy a house in Melbourne, suggesting that she might have some ties to this city.

Source: wikipedia.org