One Piece is always full of humour, the most warlike person is friends with a pigeon and wears the words Peace on his chest. Rob Lucci is born to walk the path of a C9 Agent. His scowl alone can probably send the local bullies in his street running, and although he holds an olive branch, its highly likely that he’s using it as a whip.
Jabra the werewolf is another one who’s born to walk the path of the warrior. No one from One Piece look tame even when they were young, but Jabra is exceptionally fierce. He doesn’t even bother hiding his violent nature. With a scar on his face, he acquires the alpha wolf status at a young age. Pit him against Rob Rucci