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. Humans also inhabited the Cloud Kingdom and the Never-Realm.
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, 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 and restored Mambo to power, maintaining the peace
A thousand years later, a war between humans and Serpentine began, because of mistrust betweeen the two species. Eventually, they nearly agreed upon a peace treaty, but 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, but now with an army of Anacondrai Cultists, with the help of the Serpentine, Ninja and Garmadon who sacrificed himself to send them to the Cursed Realm and release the original Anacondrai, after that Morro, a former student of him Master Wu escaped to plan his revenge and make The Preeminent in Ninjago.
Holidays that humans celebrate in Ninjago
- Garmadon (of Oni and Dragon descent)
- Lloyd Garmadon (of Oni and Dragon descent)
- Wu (of Oni and Dragon descent)