Sky Islander
Those who live up in the Sky Islands have adapted and adjusted to live in such an environment. There are three main factions that exist up here: Shandians, Birkans, and Skypieans. All three of these groups descended from a moon, sometimes referred to as "Fairy Vearth". On this moon, a great civilization existed named Shandoria. These three groups were a part of this civilization and were believed to have worked in unison.
Centuries after leaving the moon, these races have split apart and can be considered mostly divided into different tribes. These tribes now live mostly on Sky Islands and form civilizations in the clouds with their own cultures and technology. Some use a seemingly magical power called Mantra, which is actually Observation Haki.
Some sky islanders descent from the skies down to land, known as "Vearth" to them, and can interact with the various other races.
These three tribes can be described in the following ways
Shandian
Once Shandians descended from the moon, they lived on a land-based island named Jaya. However, this island was blasted into the sky by a knockup stream, leaving the Shandians stranded in the sky for many centuries. Like the others that live on these sky islands, Shandians are known to grow wings on their backs. However, unlike the other groups, their clothing is similar to real-world native Americans. Additionally, they can often be seen with large tattoos decorating their bodies. Shandians fight as fierce and skilled warriors, surviving for many long centuries with these skills.
In ancient times, Shandians fought in a great war against the twenty kingdoms on land. At the end of this war, they were defeated. However, they held on to the ruins of the golden city of Shandora and the Shandorian Golden Belfry Bell, which they now protect with their lives even after it was blasted into the sky long ago. They also protect a Poneglyph left to them by an ancient Great Kingdom they were allies with during the great war.
Birkans
Although not much is known about this civilization, it does share some similarities with other Sky Island groups. Much like the other two groups, Birkans all grow wings on their backs. However, Birkans do have a unique appearance compared to the others. Birkans can sometimes appear to have goat-like features such as long goat-like ears growing alongside their regular human ears, and small horns.
Additionally, many Birkans dress in long white robes and gowns, often resembling priests. Many birkans consider themselves divine in nature, and dress accordingly. Unfortunately, the island of Birka was destroyed many years ago, though many survivors still remain. Many Birkan survivors are gifted with strong mantra in combat.
Skypieans
Many Skypieans reside on the sky island known as Skypiea. This island is massive and contains various technologies that make use of Dials, which are found naturally around it. Many Skypieans have angel-like appearances and grow wings on their backs, similar to Birkans and Shandians. Additionally, their hair often resembles the antenna of an insect, their skin is far lighter than the other groups, and their clothes are far more basic.
Skypiea is a grand island that has come to slowly resent outsiders due to the damage dealt to them from non-skypieans. They use a currency known as Extol in place of Belly (฿). Skypieans all fully obey their great leader, known as "God".
Sky Islander Traits
Your sky islander will have these traits.
Ability Score Increase. Your Dexterity score increases by 1.
Age. Sky islanders reach adulthood in their teens and live for around a century.
Alignment. Sky islanders vary in alignment, ranging from good to evil, lawful to chaotic, but are typically neutral in some way.
Size. Sky islanders in the One Piece World are typically 5-6 feet tall. Some can rest far outside this range, but your size will count as medium.
Speed. Your base walking speed is 30 feet.
Protection of the Clouds. You are able to form fluffy floating clouds around you to reduce the speed of your fall. You gain the ability to cast Feather Fall. Once you use this ability, you cannot use it again until you complete a Short or Long rest.
Dial Proficiency. You innately understand dials that have came from sky islands and can carry one with you. Roll once on the Simple Dial Table (ask an admin) to determine which one you start with.
Languages. Sky islanders can all speak and understand the universal spoken language of this world.
Sky Islander Subraces
Subrace. The separation of groups living on the "Fairy Vearth" resulted in three main subraces splitting off: Shandian, Birkan, or Skypiean variants. Choose one of these Subraces and add its traits to your racial features alongside the ones listed above.
Shandians
Your Shandian heritage has gifted you with great strength and combat expertise.
Ability Score Increase. Your Strength score increases by 2.
Shandian Weapon Training. You have proficiency with the quarterstaff, halberd, pike, glaive, spear, and heavy firearms.
Birkans
Your Birkan heritage has gifted you with powerful observation and foresight through mantra.
Ability Score Increase. Your Wisdom score increases by 2.
Mantra Specialist. You can choose to take the Color of Observation Training feat if you meet the prerequisite.
Skypieans
Your Skypiean heritage has gifted you with great knowledge of dials.
Ability Score Increase. Your Intelligence score increases by 2.
Advanced Dial Proficiency. You start with an additional Dial, allowing you to roll once more on the Simple Dial Table to determine what other Dial you start with. Additionally, you gain advantage on all checks made to find a dial.