Allow me to introduce to you two strong women in One Piece world. They were not afraid of taking their fate in their own hands, making decisions and living as they wish. But with great freedom and power comes price and consequences. 
Lerena Newgate was adopted daughter of Edward Newgate, spoiled, arrogant, proud of her strength she laughed in the face of devil. Until the battle of Marineford.
Emeral D. Ralagan was once the second in command on Oro Jackson and king's sister. But after his death she went mad and made a deal with Davy Jones.  She became an Empress of the Seas and mother for three boys on Goa Island.