Top 4 in Top 10 Strongest Female Characters One piece.
The 4 lords of the sea Boa are also known as the captain of the Kuja pirate state. She fell in love and became Luffy's companion, so she received much love from the audience. Her power was so great that it was even acknowledged by the Fleet Admiral of the time, Sengoku of the Marines. Gloriosa believed that there was little chance of Hancock dying in the Marineford War because of her overwhelming power. Even former Admiral Kuzan commented on her skills, saying she cannot be underestimated. Further testament to her strength is how she was one of the three Lords who managed to leave the war uninjured. The fact that she was able to earn 80,000,000 bounties after her first campaign as a pirate further aided her abilities.
The comments of friends or enemies are enough to understand the powers of BoA Hancock.