One Piece: Rise of Valoria

Kael D. William, born on Ohara Island and a close friend of Nico Robin, survives the Buster Call and becomes a slave to a Celestial Dragon. Empowered by a mythical Dragon Zoan Fruit, he escapes with Boa Hancock and her sisters, vowing to take down the corrupt World Government. Together, they build the kingdom of Valor...