Ninja

The ninja (also known as the Masters of Spinjitzu) are a group of young warriors formed by Master Wu to protect the land of Ninjago from evil. Since the team's formation, they have fought many enemies.

History
After Cole, Kai, Jay, and Zane united, they fought Lord Garmadon and the Skulkin, and later, Pythor and the Serpentine, which were freed by Lloyd Garmadon. Lloyd would later be revealed to be the legendary Green Ninja, and a while after his father, Lord Garmadon, defeated the Great Devourer, he escape and lead the Serpentine after he stole the Golden Weapons, then became in league with the Overlord and the Stone Army until he was redeemed.

As the years went on, the ninja faced further obstacles and adversaries and even gained a new recruit, Nya, who joined the team as the Water Ninja. They battled the Golden Master and the Nindroids, Master Chen and the Anacondrai warriors, the Preeminent and Morro & the Ghost Warriors, Nadakhan and the Sky Pirates in an erased timeline, Clouse and the Shadow Army, and the Time Twins and the Vermillion.

After Wu's disappearance, Lloyd achieved the rank of Master, and since Wu's return a year later, they have fought Harumi and the Sons of Garmadon (both backed by the resurrected Lord Garmadon himself), Iron Baron and the Dragon Hunters, and the Omega and the Oni.

After a six-month-long period of peace, they battled Aspheera and the Pyro Vipers, the Ice Emperor (discovered to be an amnesiac Zane manipulated by General Vex) and the Blizzard Samurai.

After returning to Ninjago, the Mechanic helped Unagami and his army escape from the video game known as Prime Empire into the real world by trapping players in the game and using them as a power source to create a Manifestation Gate. Jay and Zane found the game's creator Milton Dyer who convinced Unagami to free the Gamers trapped inside the game.

Sometime after freeing the trapped gamers, the ninja wound up in the Dungeons of Shintaro, where they faced off against the Skull Sorcerer and his army of Awakened Warriors while ending a war between the Munce and the Geckles. With the power of the Spinjitzu Burst, Cole defeated the masked villain, freeing the two tribes from his tyranny, and the ninja and their master went off in search of another adventure.

Upon hearing no word from Wu and Misako, the ninja head for the Island of the Keepers where they come across the Keepers of the Storm Amulet, who trade Jay to Wojira, only to learn that it was Ronin, who had been deceiving them for their treasures. With help from Twitchy Tim, they were able to defeat Ronin.

Eventually, energy pulses would begin to make Nya's powers stir out of control, and they would find that it was coming from the Tartarus Trench. The villain, Kalmaar, requires the Storm Amulet, and he is able to gain it, awakening Wojira. As a last resort move, Nya becomes one with the Endless Sea, defeating Wojira.