Roronoa Senshi/History

Origin
Senshi's brothers has been taking care of her for as long as she can remember. She has no recolection of her parents. All she has of her parents is the small pink stone neckalace that belonged to her mother. When she was 3, Zoro was 7, and Yoro was 6, they began to train at the dojo with Kuina. Kuina befriended Senshi and taught her how to defend herself. When Kuina died a year later, Senshi vowed to fullfil her dream for Kuina, to become the Greatest Female Warrior. She trained on her own in hand to hand combat and different forms of martial arts. When she was 14, she set off on her own, booking passage on a ship headed for Lougetown. Before she left, she promised her brothers that they would meet again, on the Grand Line.

Stories before becoming a Pirate
The Thief and the Warrior. Senshi and Corey's First Encounter