Human
In the world of One Piece, humans can be considered highly invasive and territorial to most other races and creatures. While there are many good-spirited humans out there, the World Government and Navy often tarnish the reputation of humans among non-humans. Due to this fact, most non-human races don't get along well with humans on average. However, there can very well be brotherhood among these races in certain circumstances, so long as compassion and friendship is shown.
Conquerors Humans will settle in and take control of just about anywhere they can reach. The exception to this rule may be places like Fish-man Island or Zou, which are too inconvenient and out-of-reach to settle on for most human civilizations. Most of the world is conquered and ruled by humans under the World Government.
Great Kingdoms. As humans have expanded over the centuries, they have established many large cities, kingdoms, and fortresses across various islands and continents. Human culture can also be very different depending on where you look. While some human settlements can be more open-minded and accepting, other places may be far less tolerant toward outsiders and different ideas or cultures.
Human Traits
While many humans vary in shape and size, your human character will have these traits.
Ability Score Increase. Your ability scores each increase by 1.
Age. Humans reach adulthood in their teens and live for around a century.
Alignment. There is no clear alignment that is consistent among all humans. Just about any alignment can be justified.
Size. Humans in the One Piece World are typically 5-6 feet tall. Some can rest far outside this range, but your size will count as a medium.
Speed. Your base walking speed is 30 feet.
Human Variant Traits
Some humans can be noticeably different in their abilities and skills. For this reason, you may choose to instead replace the standard Human Ability Score Increase with these traits instead:
Ability Score Increase. Two different ability scores of your choice increase by 1.
Skills. You gain proficiency in one skill of your choice.
Feat. You gain one Character Feat of your choice that you meet the prerequisite for. You may only choose a Haki-related feat if you receive DM permission.
Human Giant Traits
Very rarely, some humans may grow to be astonishingly larger than most others in the One Piece world, sometimes even doubling the average human height and weight. If your human character happens to fall under this category, you may choose to replace the standard Human Ability Score Increase with these traits instead:
Ability Score Increase. You increase your Strength score by 2.
Size. Human giants are between 7 and 8 feet tall and weigh between 280 and 340 pounds. Your size is Medium.
Natural Athlete. You have proficiency in the Athletics skill.
Warrior Training. You have proficiency with the Battleaxe, Handaxe, Light Hammer, Longsword, Club, and Spear.
Giant's Endurance. You can focus yourself to occasionally shrug off injury. When you take damage, you can use your reaction to roll a d12. Add your Constitution modifier to the number rolled, and reduce the damage by that total. After you use this trait, you can’t use it again until you finish a short or long rest.
Powerful Build. You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.
Kuja Traits
If your human character is female, you may choose to take this Kuja variant subrace. If you do so, you may choose to replace the standard Human Ability Score Increase with these traits instead:
Ability Score Increase. You increase your constitution, wisdom, or charisma score by 2.
Skills. You gain proficiency with longbows, shortbows, shortswords, and spears.
Beginner Haki. You can choose to take the Color of Armament Training feat if you meet the prerequisite.