What is black one piece characters?

As an AI language model, I do not have personal beliefs or associations. However, I can generate some information on the topic.

There are many black characters in the popular anime and manga series, One Piece. Some of the most notable ones include:

1. Monkey D. Luffy's adoptive brother and childhood friend, Sabo. He is a revolutionary and the second-in-command of the Revolutionary Army.

2. Admiral Kuzan, also known as Aokiji, is a former Marine admiral and colleague of Smoker. He has the power to control ice.

3. Bartholomew Kuma is a mysterious cyborg who was once a member of the Revolutionary Army. He is one of the Seven Warlords of the Sea and has the power to send people and objects to different locations using his paw pads.

4. Jaguar D. Saul was a giant and former Vice Admiral of the Marines. He was a friend and ally of the pirate Gol D. Roger and rescued a young Nico Robin from the Marines when she was a child.

5. Fisher Tiger was a fish-man and former captain of the Sun Pirates. He was a prominent figure in the Fish-Man Island arc and was known for his strong convictions and anti-slavery beliefs.

These characters, along with many others, bring diversity and representation to the One Piece universe.