Master Lloyd Montgomery Garmadon is the legendary Green Ninja, the Master of Energy, a user of Destruction, the former Golden Ninja, the current leader of the ninja, and mentor of Arin and Sora. He is Garmadon and Misako's son, Wu's nephew, and the First Spinjitzu Master's grandson. Once a bratty kid who sought to follow in his evil father's footsteps, Lloyd changed his ways by helping the ninja and embracing his destiny as the Green Ninja. As the ninja trained Lloyd, he reunited with Misako, artificially matured into a teenager, and faced a Garmadon manipulated and possessed by the Overlord—becoming the Golden Ninja. Though Garmadon was purified, the Overlord later returned, but was vanquished upon Zane's sacrifice. Lloyd brought the team together to save Zane in the Tournament of Elements, culminating in the Second Serpentine War, which ended with Lloyd having no choice but to banish his father to the Cursed Realm; accidentally freeing Wu's old pupil, Morro.
Morro soon had possessed Lloyd and claimed the Realm Crystal to free the Preeminent, eventually succeeding. With the help of the ninja, Lloyd escaped Morro's possession in a trade and helped battle him, but the Preeminent's death destroyed the Cursed Realm, killing Lloyd's father, the Anacondrai Warriors, Chen, and any other beings imprisoned inside, and Djinjago, as they were sister realms. Shortly after, Lloyd helped battle the Sky Pirates and their captain, Nadakhan. The fight against the Sky Pirates was undone along with all other recent events after Jay reversed time in his final wish. On the Day of the Departed, Lloyd and Misako commemorated Garmadon at the Corridor of Elders, where he fought against Pythor. Lloyd would later battle the Time Twins and their Vermillion army. Lloyd temporarily led the ninja and became their new master while Wu was lost in time.
Lloyd led the ninja against the Sons of Garmadon, who sought to resurrect his father, while also being attracted to Harumi—who is revealed to be the Quiet One and ends up being the leader of the group. Lord Garmadon is resurrected as an evil warlord, disowns and nearly kills Lloyd in a vicious battle that strips him of his powers. After the Colossus seemingly killed the original ninja and a toddler Wu, Lloyd led the Resistance against his corrupted father and his followers, the Sons of Garmadon. Eventually, all of the ninja returned to Ninjago and helped fight the Sons of Garmadon. In a climactic battle, Lloyd regained his powers while using the Art of the Silent Fist and defeated his father, who warned him of coming darkness as he was arrested. When the Oni invaded Ninjago, Lloyd and Garmadon discover the secret to defeating them is the Golden Armor. With the Golden Weapons rebuilt, Lloyd, the ninja, Wu, and Garmadon combined their powers into an ultimate Tornado of Creation, vanquishing the Bringers of Doom and freeing the realms from their destructive grasp.
Months after the Oni's invasion, Lloyd and his friends became very leisurely for a time, until a series of new conflicts broke out; they battled Aspheera's army and journeyed to the Never-Realm to fight a corrupted Zane, then battled digital enemies in Prime Empire, and waged war in the Dungeons of Shintaro against the Skull Sorcerer and his legions. Sometime later, Lloyd traveled to the Island of the Keepers to save Misako and Wu. He ended up having to rescue all the other ninja when he was the only one to escape being captured by the Keepers. There, the ninja discovered the Storm Amulet and the existence of Wojira. He realized that the Keepers were being tricked into giving away sacrifices to a fake Wojira, and stopped the Kryptarium inmates who were behind it. Later, he would explore the sea with Maya, Nya, Zane, P.I.X.A.L., Jay, and Benthomaar to stop Kalmaar from awakening the evil serpent, Wojira. Unfortunately, the serpent was awoken and attacked Ninjago. Lloyd saved as many people as possible but Wojira was so powerful Nya had to sacrifice herself to defeat her. After that, he went to a memorial to honor Nya.
One year later, all the ninja minus Zane and Cole went on their separate ways after Nya's sacrifice, with Lloyd working on cleaning windows in the city. However, he was convinced to be back in action to successfully return Nya to her human form, though with the cost of releasing Aspheera from incarceration and stealing her staff, resulting in the ninja being imprisoned in Kryptarium Prison. However, Lloyd and the ninja escaped to investigate the Crystal King's identity and plans of forming a Council of their past enemies. Lloyd went undercover as the Mechanic into the Council to investigate, but he was captured while shocked and horrified to see Harumi revealing herself to be alive. After Harumi and the Council initiate a ritual to summon the Crystal King, Lloyd is shocked to learn that the Crystal King is really the Overlord. He later manages to escape and rejoins Master Wu and the ninja. Lloyd and Master Wu follow a lead that brings them face-to-face with Garmadon. After seeing the effectiveness that Garmadon's newfound Oni form had against the Crystal King's army, Lloyd undergoes Garmadon's Oni form lesson but it proved unsuccessful. Later on, Lloyd and Garmadon face off in an epic battle against the Crystal King, with Harumi joining them. Lloyd uses the Golden Ultra Dragon to defeat the Crystal King, ending his terror on Ninjago City, and is last seen helping to rebuild the ninja's previously destroyed monastery.
When The Merge brought all 16 realms together, Lloyd takes in Arin, who had lost his parents, and Sora, who ran away from the Imperium, to train them to be Ninja, protect Riyu from the Claws of the Imperium, find the rest of the ninja, and discover the mystery of the Merge. After reuniting with Kai and Nya, Lloyd, Arin, and Sora went to Imperium, where Lloyd met Wyldfyre, before disabling Sora's old invention, the Photac, and escape through an underground monastery, with help from Zane and the Source Dragon of Energy. Through Nya's research, they head for the Temple of the Dragon Cores and learn from the spirit living there that three Dragon Cores can stabilize the merged realms, with Lloyd and Arin going for the Pink Dragon Core, which they acquire after a brief interference from Administration Agents, and return to Imperium with Kai, Zane, and Wyldfyre, where a resistance group recruits them to expose Empress Beatrix of her lies, she retaliates by creating a MergeQuake Storm. After Sora achieved her True Potential and Arin sent Beatrix into a MergeQuake rift, Lloyd used the cores to stabalize the world and free the Source Dragon from Imperium.
The following year, Lloyd learns from Kai, Cole, Arin, and Sora about how they stopped Lava-Tides stealing eggs from Ice Dragons. Sometime later, he and Arin defeat the Mechanic thanks to NinjaFanInfinity and SpinjitzuForDays99 distracting him from the two. Lloyd and Arin later rescue Lobbo from his mech, when it was out of control.
