Tsunade

Tsunade is a middleage woman who got arrested, because she didn't want to marry one of shoguns elite guard member.

Tsunade's story before meeting Roy
2 years before White Glove Pirates arrived at Wano, Tsunade was arrested because she didn't want to marry the man who proposed to her. About 2 years after that incident she broke out from Udon prison and began traveling across her country. One day she met the man who proposed to her a long time ago. She fought him, and punched him to death.

Not so long after that she met White Glove Pirates.