There is no shortage of tragic backstories in One Piece. Many fans have their own opinions regarding which character has the saddest, most heart-breaking backstory in the franchise's extensive list of characters. Some might point to the people of Wano, who spent 20 years under the Beast Pirates' boots. Others may cite Señor Pink and his reason for always dressing ike a baby. However, there is one person in One Piece whose backstory is far sadder than Sanji's ever could be.
Source：https://www.cbr.com/one-piece-kuma-saddest-story/
