This is a manga that I have recently read. It's about three girls- Julin, Kalin, and Seilin. Until Julin's 15th birthday, none of them knew they were sisters. Julin's master gives her a bell as her present, and tells her that she has two older sisters: Kalin of the Gold Pavillion and Seilin the Pirate Queen. After her master is killed by the White Lotus Clan, Julin and her bird Juliney leave their fighting school to find her sisters.