At the age of nineteen, four brothers set sail with the Strawhat Pirates to pursue their dreams and discover the world.
Ichiji is a stoic, logical, no nonsense kind of person. Though one of the more thoughtful brothers, Ichiji is still unsure what he wants to do with his life. His official role on the crew is Chronicler and occasionally acts as a Historian, often working with Nico Robin when it comes to information.
Niji is the Technician on the Strawhat crew, immediately finding kinship with Usopp and later Franky. He dreams of learning all he can so that he can make the best inventions in the world.
Sanji hasn't changed from the cannon story. He joins the crew as the Chef and dreams of finding the All Blue. Sanji does butt heads with his brothers as he's determined to appear on equal footing with them. His brothers are also the only people he will rely on because he knows they can handle dangerous situations.
Yonji is the crew's Rigger and Deckhand. Yonji can be arrogant and quick to pick a fight but he is occasionally mindful when he needs to be. Yonji joins the Strawhat crew because of his dream of traveling the world.