Old friends, and new adventures

Jiyū Kurai (last name first) was best friends with Luffy, Ace and Sabo when she was little (like a sister,but on par with them). But one day she was kidnapped by a bad organization. They experiment on her and years later she escapes, only to find herself in the Grand line. So she decides to search for her brothers to help them with their dreams. But of course who said she couldn't wander around first, along with having a promise to fulfill...finding her brothers may take a while.