AVATAR OF THE SEAS(ONE-PIECE HAREM)

Avatar Yangchen to Avatar Aang.
"THE AVATAR MUST BE COMPASSIONATE TOWARDS ALL PEOPLE, AND THE ONLY WAY TO DO THAT IS TO LIVE WITH THEM. THE AVATAR MUST EXPERIENCE SADNESS, ANGER, JOY, AND HAPPINESS. FEELING ALL THESE EMOTIONS, HELPS YOU UNDERSTAND HOW PRECIOUS HUMAN LIFE IS, SO YOU WILL DO ANYTHING TO PROTECT IT."

Synopsis:

After Avatar Wan, the first Avatar, united humanity and the spirit world, the balance was briefly restored. However, chaos soon followed in the form of deep unrest between newly-formed nations. The second Avatar, Avatar Shen, was born into this turbulent era. Master of all four elements, Shen quickly became a beacon of peace and strength, striving to maintain harmony in a world still learning how to coexist with the spirits and bending. Despite his best efforts, fractures between nations began to widen.

Shen's most significant challenge came when a dark spirit, angered by humanity's growing conflicts, sought to shatter the balance that Wan had painstakingly built. This spirit wielded immense power, capable of transcending the dimensions between worlds. During their climactic battle, the spirit cast a portal that dragged Shen into the vast oceans of the One Piece world.

In this strange and chaotic world where pirates, marines, and devil fruits dominate, Shen finds himself stripped of his connection to the Spirit World but not his bending abilities. Now, lost and adrift, the Avatar must navigate this new world, seeking allies among pirates and revolutionaries while rediscovering his purpose. His mission remains the same: restore balance, but now it's within a realm ruled by the powerful and tyrannical forces of the World Government.

I don't own Avatar the Last Airbender or One-piece