After the First Spinjitzu Master created Ninjago, humans populated the island. It is unknown if he created them or if they originated from elsewhere. He chose several humans to inherit the Elemental Powers, making them Elemental Masters.
At some point, humans and the Serpentine lived in fragile harmony, thanks to the First Spinjitzu Master and the leader of the Serpentine tribe that would eventually be known as the Pyro Vipers, whose name was Mambo the Fifth. This peace existed for millennia, but was threatened when the First Spinjitzu Master's children trespassed into Serpentine territory and set off a chain of events that led to the young sorceress Aspheera usurping King Mambo and nearly declaring war on humanity. Wu and Garmadon defeated her using Forbidden Spinjitzu, restoring Mambo to power, thus maintaining the peace.
A thousand years later, a war between humans and Serpentine began because of mistrust between the two species. Eventually, they almost agreed upon a peace treaty. Before that could happen, Chen deceived both sides, telling them that the other side is going to betray them. The Elemental Masters managed to defeat the Serpentine thanks to the Sacred Flutes and the Serpentine were locked in tombs, the Anacondrai Generals were sent to the Cursed Realm, and Chen and Clouse were exiled to an island for 40 years.
40 years later in modern times, Chen returned, now with an army of Anacondrai Cultists, with the help of the Serpentine, the Ninja, and Garmadon, who sacrificed himself to send them to the Cursed Realm. This was done to release the original Anacondrai. Morro, a former student of him Master Wu escaped the Cursed Realm at this time, planning his revenge, which was to bring The Preeminent in Ninjago.
In the Cloud Kingdom
In the Cloud Kingdom, monks are responsible for writing the destiny for people.
In the Never-Realm
Holidays Celebrated by Humans
- Garmadon (of Oni and Dragon descent)
- Lloyd Garmadon (of Oni and Dragon descent)
- Wu (of Oni and Dragon descent)