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Kai, the Red Ninja and Master of Fire
- Voiced by: Vincent Tong
- Acquired Situational Narcissism: As a result of the Ninja achieving celebrity status by Season 6, the fame goes to Kai's head and causes him to develop a bigger ego. He indulges his fangirls by constantly flirting with them, enjoys merchandise styled after his image, and is addicted to using Chirp (the in-universe version of Twitter).
- Badass Biker: He owns a pretty mean bike that he loans to Nya during his ninja training.
- Big Brother Instinct: For Nya. He's been taking care of her ever since the disappearance of their parents when he was five years old. His immediate thought of action when she gets kidnapped in the pilot is to save her, which motivates him into becoming a ninja.
- Big Brother Mentor: He acts as one towards Lloyd due to having sworn to help him train. This comes to a head by the time Season 5 rolls around, since he acts more brotherly towards the green ninja after the latter lost his father and is heartbroken when he learns that Morro took over Lloyd's body.
- Berserk Button: Do not harm his comrades and especially don't harm Nya.
- Brother–Sister Team: He works best alongside his sister Nya, best shown in "Day Of The Departed" when they fight together to successfully defeat the resurrected Master Chen and his cronies. Season 7 also has both of them as the main focus, working together to retrieve the last Time Blade and using their elemental powers to create the Fusion Dragon.
- Everything's Better with Samurai: In the pilot, he dons armour and fights like one, and Sensei Wu mentions that his shop sells weapons well suited for them. He also has the moral/honor code of one and his sister is Samurai X.
- Friend or Idol Decision: This is what triggers his True Potential. After obsessing over the idea of being the Green Ninja for most of the first season, when faced with the decision to either save the last Fangblade or Lloyd from volcanic lava, he chooses the latter - finally understanding that he was meant to protect the Green Ninja instead.
- Good Scars, Evil Scars: He has a scar running through his left eye and brow on his mini figures in the sets, and is clearly heroic. Curiously, he does not have said scar in the show but retains the split eyebrow as part of his character design.
- Generation Xerox: His future self looks remarkably like his father (sans the facial hair), from whom he also inherited his fire elemental powers.
- Hair-Trigger Temper: His temper is equally as hot as his element, fire!
- Heroes Want Redheads: Falls in love with Skylor.
- Katanas Are Just Better: A Flaming Sword is even better!
- Jerk with a Heart of Gold: He's arrogant, hotheaded, and has repeatedly overestimated his abilities, but he genuinely cares for Nya and the other Ninja.
- Leeroy Jenkins: He has an alarming tendency to dive into action headfirst without much thinking, which can endanger the success of the team.
- Love at First Sight: With Skylor. He develops a massive crush on her when he first sees her and openly admits to having fallen for her after her betrayal is revealed.
- Meaningful Name: Kai means "strong," "victorious," and "recovery," in three Asian cultures, all of which fit his hotshot attitude. His name may also be derived from the Japanese word akai, meaning "red."
- My Sister Is Off-Limits!: He shows hints of this concerning Jay's crush on Nya in the pilot, although he ultimately accepts it when they start dating.
- Playing with Fire: As the Ninja of Fire, he possesses pyrokinesis (ie. being able to create fireballs, propel himself upwards using fire, create a shield out of fire, etc).
- Personality Powers: Kai is hot-headed, impulsive, and quick to anger - which matches his element, fire.
- Shonen Hair: Incredibly improbable spiky hair that no one else has? Check. Reckless and stubborn? Check. The main character? Well...
- Supporting Protagonist: He is neither The Hero nor is he the Green Ninja. He's still the main character, but only for the first season and the pilot episodes.
- Subverted and then deconstructed in Season 4. His story gets the most focus here, making the point that he can be self-centered and is overall disappointed in the fact that he wasn't the Green Ninja. The Big Bad himself tries to exploit this in order to try and draw Kai to his side, though it fails due to his loyalty to his friends.
- The Quisling: He appears to have been swayed to Master Chen's side in the Tournament of Elements. It was a ruse to get the Staff of Elements away and he destroys it in order to give everyone their elemental powers back. Though he is briefly swayed by its power.
- Undying Loyalty: Kai is consistently dedicated to the people he cares about - once someone earns his friendship, he will stop at nothing to protect them. Much of his stubbornness and recklessness stem from his desire to help his loved ones, either directly or by becoming strong enough to defeat anyone who might threaten them with their plans. In turn, they balance out Kai's more extreme traits, causing him to become a levelheaded mentor for Lloyd.
Jay Walker/Gordon, the Blue Ninja and Master of Lightning
- Voiced by: Michael Adamthwaite
- Adorkable: His geeky ways, sweet personality and reluctance to fight enemies directly make him quite lovable.
- Battle Couple: With Nya. They combined their elemental powers to create the first Fusion Dragon seen in the show, and figured out how to fight the Vermillion together.
- Berserk Button: Hey, Cole, next time Nya gets captured, try unintentionally making a joke. Go on, try it!
- Cowardly Lion: He's usually reluctant to fight enemies directly, frequently makes up excuses not to do so and is typically the first to panic in stressful situations. That doesn't stop him from being a hero, however.
- A Day in the Limelight: As the focus character of Season 6, his tendency to hide his true feelings is highlighted, and more emphasis is put on his insecurities regarding his relationship with Nya's relationship. He also undergoes a Trauma Conga Line in order to learn that actions have consequences.
- Fire-Forged Friends: With Cole. They spend a lot of time being mad at each other over the Love Triangle with Nya, but reconcile during the tournament of Elements and come to see one another as best friends.
- Gadgeteer Genius: Given that he grew up in a junkyard with access to spare materials, it's no surprise that he picked up a knack for creating inventions and gadgets from the eccentric Ed and Edna.
- Genius Bruiser: His lightning powers can be quite versatile especially it comes to technology, of which he is the most knowledgeable about (aside from Nya and maybe Zane).
- Happily Adopted: Ed and Edna aren't Jay's biological parents. He's actually the son of the famous actor Cliff Gordon, who played the role of his favourite character Fritz Donnegan, and the Elemental Master of Lightning. Despite this, Jay still loves and cares for them especially after the reveal, as shown by him spending time with them on the Day of the Departed.
- Kid-Appeal Character: He's the most childish of the ninja, retains a love of video games, provides comedy in the most serious of moments, and can be very mouthy.
- The Leader: While he normally isn't one to take up this role, he briefly does so out of necessity in Season 6 when he puts together a team of backup Ninja involving Skylor, Ronin, Dareth, Echo Zane and Captain Soto in order to crash Nadakhan's plans to marry Nya and free his friends from the Sword of Souls.
- Meaningful Name: The name Jay means 'to rejoice' in English tradition, fitting well with his jovial personality.
- Motor Mouth: He's by far the chattiest of the ninja, and once he starts ranting, it's difficult to get him to stop. Lampshaded in the very first episode, "Way of the Ninja".Cole: More like mouth of lightning.
- Official Couple: After spending three seasons being uncertain about their relationship, he finally gets together with Nya at the end of Season 6, as confirmed by their Big Damn Kiss.
- Only Sane Man: He frequently points out problems that the other ninja tend to overlook - especially in Season 6, when he's the only one who realizes the ninja shouldn't be trying to defeat Nadakhan with his own wishes.
- Plucky Comic Relief: His main role in the team. He's a light-hearted character who is always telling jokes, even when no one else finds them funny or while he's in danger. His presence never fails to lighten up tense or dramatic situations.
- Sad Clown: As noted by Nadakhan, his wisecracking tendencies are usually a cover for his fears or anxiety. This is especially obvious in season 6, where it's shown that he's increasingly being pushed to his limits but still keeps up a silly and cheerful facade.
- Shock and Awe: He can shoot lightning from his hands and/or weapons, and is able to manipulate electricity in order to reprogram technology.
- Unusual Eyebrows: He's missing a chunk of his right eyebrow for unknown reasons.
Cole, the Black Ninja and Master of Earth
- Voiced by: Kirby Morrow
- Big Ol' Eyebrows: His main defining facial feature, amplified by his tough personality and physical strength. It appears that it runs in the family since his father has them as well.
- Calling Your Attacks: Whenever he performs the titular Triple Tiger Sashay move. He follows it up with a tiger growl at the end.
- Dueling Scar: Cole earns a ghostly scar after the Day of the Departed incident, obtained from his battle against Yang and escaping through the Rift.
- Dishing Out Dirt: His elemental power is Earth, which allows him to create earthquakes and fissures, throw rocks and dust at his enemies, and even bury things in rapidly-rising mounds of dirt. Super Strength is also part of the package deal.
- Disney Death: Cole was thought to have not made it through the rift in Day of the Departed and was assumed to have died / faded away as a ghost, but it was revealed it was not the case, thankfully.
- The Leader: While he was never officially considered the leader of the Ninja, he has displayed traits associated with leadership in seasons 1-3, particularly of the levelheaded variety. He often develops the Ninja's plan of attack against their foes, remains calm during missions for the most part, and reminds the others to stay focused on their task.
- Lethal Chef: He seems to be the one who does most of the cooking for the group, though he apparently isn't very good at it.
- Lovable Jock: While he's physically the strongest and most athletic of the team, he clearly also cares for them and can be quite sentimental at times.
- Meaningful Name: The name Cole, aside from being a play on the word coal, means warrior in Irish tradition.
- Missing Mom: His mother is never mentioned by him or his father anywhere in the show. It's possible that she may be deceased since his father is shown waiting for him to light a lantern together in the Day of the Departed.
- The Nicknamer: Frosty and Pinky for Zane, Slickster and Greaseball for Kai, Mr. Fancy for Jay... At some point or another, he's referred to nearly everyone by a nickname of some sort.
- One-Note Cook: Can only cook very basic meals, but is very ecstatic to try new ones.
- Real Men Wear Pink: He seems to like cooking and dancing (after he got over his resentment towards it due to his father.)
- Super Strength: Cole gains this as part of his Earth elemental powers after unlocking his True Potential. It gets an upgrade in the form of his RX powers, which allows him to turn his arms completely rock solid. However, it's later shown that he can't necessarily control it.
- Trademark Favorite Food: He really loves cake, which has become a Running Gag at this point. Apparently he can't even resist eating it while on the run, and the trail of crumbs left behind leads to Ronin discovering his location in "Public Enemy Number One".
- The Undead: He becomes a ghost in Season 5 as a result of dropping the scroll needed to learn Airjitzu on the way out of Yang's haunted temple, causing him to not get out in time for the curse to be lifted. Reversed as of "Day of the Departed", in which he recovers his human form with a new scar for his troubles.
- "Well Done, Son!" Guy: He feels great shame over lying to his father for not following in his footsteps to become a dancer. This is worsened when his father learns of the truth in addition to the fact that he's a ninja. Essentially, his father's approval had been holding Cole back from unlocking his true potential. After being saved from potential death, Cole's father accepts his son's life choices and the two go on to repair their relationship.
Zane, the White/Titanium Ninja and Master of Ice
- Voiced by: Brent Miller
- A Day in the Limelight: Season 3 focuses a lot more on him than the other Ninja as he learns about the limits of his technology and grows closer with P.I.X.A.L, a fellow robot.
- The Ageless: He is unable to physically age due to being a robot, which causes him to out live his creator. He's implied to be the oldest out of the ninja (around 40 years old at most) but still looks like a vaguely-aged teenager.
- An Ice Person: His element is Ice, which allows him to spontaneously create ice and freeze water to his advantage.
- Badass Bookworm: He reads the most out of the four main ninja.
- Battle Couple: He gets to be one with P.I.X.A.L. in the third season. She becomes a Voice with an Internet Connection from then onward after Zane uploads her consciousness into his body, after her original body is destroyed.
- Brain Uploading: When his original body is destroyed to defeat the Overlord, P.I.X.A.L. builds him a new one. It takes him a while to get adjusted and he suffers from temporary amnesia as a result, but ultimately gets better and re-fashions himself as the Titanium Ninja because his newer body is more high-end due to being built by Borg technologies.
- Brought Down to Badass: After giving P.I.X.A.L. half of his power core, he is unable to use Spinjitsu by himself like he used to. However, he can use Spinjitsu with P.I.X.A.L. because she gained some of his power and fighting ability from his core.
- Broken Ace: When Pixal was destroyed after the fall of the Ninjroids, but quickly recovered when he found her in Chen's prison.
- Cloud Cuckoo Lander: In the first season, he is unaccustomed with societal manners and appears to be in his own world.
- Cool Bike: His snowmobile.
- Cool Plane: His Ninjacopter in Season 3.
- Do-Anything Robot: He's been used as a battering ram and a lamp - in the very same episode!
- Four-Temperament Ensemble: Melancholic.
- Fuuma Shuriken
- Heroic Sacrifice: In the third season finale, he single-handledly destroys the Overlord at the cost of blowing up with him. His mind, however, lives on, and he's found out to be alive in another robot body.
- Late-Arrival Spoiler: Chances are you've already seen the commercials heavily featuring Zane with part of his face torn off, showing off his robotic body underneath.
- Meaningful Name: The name Zane means beloved in Arabic tradition; and he certainly is by his father, P.I.X.A.L., his fellow ninja, and his hoard of fangirls.
- Mix-and-Match Weapon: He gets a few over the course of the series; such as his Shurikens of Ice (which can be put atop a staff to make a sort of Mace) and his Techno Blade.
- Nice Guy: He's typically the nicest of all the ninjas and never bears anyone ill will. Interestingly, later seasons also make him a bit of a Deadpan Snarker.
- No Sense of Humor: Zane typically doesn't understand when his teammates are joking around, and even has to be prompted when to laugh at times. He actually has a sense of humor, but his humor switch is normally switched off.
- Although it should be noted that he can be humorous and amused by things, even with his switch turned off. His sense of humor is just on a different page than everyone else's most of the time.
- Ridiculously Human Robot: Seeing his own blueprints served as the catalyst for his Robotic Reveal. This came across as a huge surprise because up until that point, he behaved mostly like a regular human (albeit without a sense of humour) that could eat and sleep, and even had a prophetic dream involving the Green Ninja. There was some subtle foreshadowing prior to this, however - Zane was capable of holding his breath underwater for amounts of time that wouldn't be possible unless he didn't need to breathe, for starters.
- Screams Like a Little Girl: After he is regressed into a child during a sequence in Season 2. Don't ask how a ''robot'' can be reverted "back" into something he never was - it's magic, OK?
- Ship Tease: So, so much with P.I.X.A.L.
- Team Chef: Zane is usually in charge of the cooking. And he's pretty good at it!
- The Smart Guy: His intellectual knowledge bypasses the rest of the ninja (helped by the fact that he's a robot), allowing him to make the most logical choices for the team. According to Master Wu, he is also the wisest and most spiritual ninja, thus allowing him to keep his cool in a rough situation.
- We Can Rebuild Him: Zane's consciousness survives the blast that destroyed his original body and is reuploaded into the Borg computers. With the knowledge that Zane is still alive, P.I.X.A.L. quickly builds a new nindroid body made of titanium for him. However, it takes a while for Zane to fully adjust to and accept his new form.
Lloyd Montgomery Garmadon, the Green Ninja and Master of Energy
- All of the Other Reindeer: Lloyd mentions that he hates the time he spent at Darkley's Boarding School for Bad Boys, heavily implying that he was frequently bullied there. The Lloyd Garmadon's Blog at LEGOClub.com confirms that he was indeed the Chew Toy of the school.
- All Your Powers Combined: As the Green Ninja, he can use the four main elements - earth, fire, ice and lightning. He later loses this ability when the Overlord steals most of his Golden Power and he shares the rest of it with the other four ninja, leaving him with just the element of Energy.
- The Atoner: He shows genuine remorse for releasing the Serpentine after his Heel–Face Turn.
- Badass Adorable: He is adorable in every way. But don’t forget, he is the most skilled Ninja who is capable of holding his own against all evil threats.
- Big Bad Wannabe: In the first season. It didn't go so well as he learned all snake tribes couldn't be trusted and gets betrayed by every one of them. At one point, when Fangtom and Skales are discussing what to do with him, Fangtom suggests turning him into one of them, but Skales says "Nah, the little tyke's pretty useless."
- Bratty Half-Pint: As a child, he had a mischievous streak that led him to frequently pull pranks on others.
- The Chosen One: He is the Green Ninja destined to defeat the "ultimate evil" (in this case the Overlord, not Lord Garmadon as it was previously thought) and become the savior of Ninjago. He succeeds in the climatic battle against the Overlord, reducing him to almost nothing.
- Chrome Champion: His suit turns golden after becoming the Ultimate Spinjitzu Master.
- Dark and Troubled Past: He was abandoned by both of his parents (not that they had any other choice) and left at a boarding school for kid villains. He was heavily bullied at said boarding school and got expelled for not having the drive to commit actual evil. He tried to prove his worth as a villain since then, only to fall into Humiliation Conga over and over again courtesy of the ninja. Fortunately, he was taken in by his uncle, Master Wu, and the ninja, and was made to see the error of his ways.
- Demonic Possession: Morro pulls this on him for most of season five, using his body to carry out his plans. He tries to break free from the possession a couple of times, albeit briefly.
- Determinator: Hs refuses to quit during the Final Battle, which is ultimately what unlocks his true power as the Ultimate Spinjitzu Master.
- Distressed Dude: The Serpentine kidnap him when they find out that he infiltrated the City of Ouroboros.
Lloyd: Why do I always get tied up?
- Lampshaded in "Double Trouble".
- Again in season 5 when Morro takes over his body.
- Evil Is Petty: All of his evil deeds revolved around stealing candy and pulling pranks. He was also kicked out of boarding school for not having the drive to commit actual evil.
- Foreshadowing: His shirt has a green number five on it, pointing towards him becoming the Sixth Ranger.
- He was kicked out of the Boarding School for Bad Boys because he didn't have the drive to commit any actual evil. Turns out, he became the strongest hero in Ninjago. Go figure.
- Freudian Excuse: The bullying he suffered back at his boarding school spurred him to become a villain like his father.
- Friendless Background: During his time at Darkley's Boarding School for Bad Boys. Brad was his Only Friend who taught him the art of revenge, though only in secret.
- Golden Super Mode: When he realizes his true power during his battle with the Overlord.
- The Hero: An unusual version of this trope. He turns out to be the Green Ninja, and after his Heel–Face Turn, he uses this status to protect Ninjago from evil threats.
- Heroic Sacrifice: Sacrifices his childhood to defeat the Grundel, being aged up to adulthood with no turning back.
- Knight of Cerebus: While he isn't technically a villain, the series gets less funny and more dramatic once he grows up.
- Law of Chromatic Superiority: He rises above the others and becomes the Green - later Golden - Ninja who successfully defeats the ultimate evil in all of Ninjago. Even after being depowered, he remains the most powerful member of the team.
- The Leader: Takes over Cole's role after he Took a Level in Badass as a result of a Plot-Relevant Age-Up in the last episodes of the second season. By the fifth season, it is even lampshaded by many characters, including Cole himself, that he is the leader of the ninja.
- Overlord Jr.: He wanted to follow in the footsteps of his Evil Overlord father, to the point of modeling his attire after him. He wore a cape, had an evil laugh, and sided with the most despicable creatures in Ninjago.
- Plot-Relevant Age-Up: He was left with no choice but to use Tomorrow's Tea and discard his childhood in order to save the child-ified Ninja from the Grundle.
- Happens again in "Wishmasters", when Lloyd wishes to be wise like Sensei Wu. Not only does he gain increased agility and intelligence, he also "becomes like him", rapidly aging him to an old person. He returns to being a teenager in "The Way Back", when Jay's wish erases everything that happened in the entirety of Season 6.
- Punny Name: Lloyd Garmadon, son of Lord Garmadon. This initially confuses the ninja, who mistook him for Lord Garmadon when they learned that he was terrorising Jamanakai Village.
- Rookie Red Ranger: While he definitely isn't the main character, he is the most inexperienced of the ninja at the time of joining them. He later becomes the Green Ninja.
- Sixth Ranger: While he first joins the team following his Heel–Face Turn, he officially becomes the fifth ninja once he learns of his destiny as the Green Ninja.
- Strong Family Resemblance: He's the spitting image of his father in both childhood and youth, with the exception of him having blond hair instead of Garmadon's brown.
- Sweet Tooth: He really liked candy as a kid. Heck, his first appearance involves him threatening to unleash the Serpentine on a village if they didn'te give him all their candy. When he does succeed in raiding said village, he gets a sugar high from eating too much candy.
- Tagalong Kid: Post Heel–Face Turn, except he isn't really The Load. The kid part soon becomes subverted.
- Took a Level in Badass: He slowly becomes more and more skilled as the series goes on, especially in season two when he undergoes intensive training to control his powers and prepare him for the final battle against his father, and later, the Overlord.
- Took a Level in Kindness: He becomes nicer and more open towards his uncle and fellow ninja post-Heel–Face Turn.
Nya, the Master of Water and formerly Samurai X
- Voiced by: Kelly Metzger
- A Day in the Limelight: While she has yet to receive her own season, season five focuses on the struggles of her learning to use her element.
- Action Girl: She displays a willingness to fight as early as the pilot episode, in which she fights alongside Kai to ward off the Skullkin.
- Badass Adorable: She may be a ninja, but appearance and ESPECIALLY her voice is pure cuteness.
- Badass Normal: Even before she learnt about her powers, she makes up for lack of combat experience with awesome skill and gadget making.
- Badass Driver: Her performance with the drill car thing in "The Last Hope". Oh my God, yes.
- Brainwashed and Crazy: In episode 25 she's exposed to the Overlord's Psycho Serum. The results aren't pretty.
- Fatal Flaw: Nya's greatest weakness is feeling weak. Since she's so good at so much, when she encounters something she can't instantly master she gives up without trying. She needed to learn to accept failure before she could unlock her true potential.
- Died in Your Arms Tonight: In "The Way Back", the Ninja weaken Nadakhan with a Tiger Widow Venom dart, only for some of it to land on her. Since Tiger Widow Venom slows down a djinn and kills a normal human, she ends up dying in Jay's arms. Luckily, Jay's last wish ends up reversing everything that happened in Season 6, saving Nya.
- Everything's Better with Samurai: Her mecha-suit is shaped like a samurai.
- Gadgeteer Genius: Not only did she build her Samurai Mech and armor by herself in the spare time she had while the Ninja were on missions, she modifies the Ultra Sonic Raider to incorporate a detachable flight module, and later builds Kai his own Fire Mech.
- Gave Up Too Soon: As pointed out by Sensei Wu, Nya had a very rocky time trying to do any other mundane task in her life because she always couldn't stand failing once and forcing herself to do something else, only to repeat the cycle. This comes up really hard on her when she tries to become the Water Ninja.
- Generation Xerox: While her brother inherited their father's fire element, Nya inherited the water element from her mother.
- Giant Wall of Watery Doom: She's able to create one to defeat Preeminent once and for all.
- It Is Pronounced "Tro-PAY": While never referenced in-series, her name is pronounced Nya (NE-a) as opposed to the more Japanese-esque way (NI-a).
- Late-Arrival Spoiler: There are not one, but two of these associated with her; not only is she Samurai X, she's also the Ninja of Water. Anyone who's seen trailers more recent than 2015 or the Movie would know this.
- Making a Splash: She currently holds the element of Water, which allows her to spontaneously shoot jets of water and make it rain.
- Official Couple: She gives Jay a Big Damn Kiss in "The Way Back", signalling that she has finally recognised her feelings for him without a shadow of a doubt.
- Samus Is a Girl: She reveals to Kai and later the whole team that she is the Samurai X that has been upstaging the ninja and getting them out of trouble.
- The Sixth Ranger: While she had always been part of the team from the very beginning, she officially becomes a ninja with the discovery of her water powers.
- The Smurfette Principle: Before the addition of Misako, she was the only girl on the team. She's still the only female Ninja in the show.
- Tomboy: In her desire to prove that she's tougher than the boys, she disguised herself as Samurai X to fight alongside them. She's also a major Action Girl and Wrench Wench.
- Trailers Always Spoil: She is shown wearing her custom ninja gi in trailers for season 5, with later seasons showcasing her water elemental powers.
- Triang Relations: In Season 3, a love fortune machine tells her that her true love is not Jay but Cole. She tries to deny this at first, but she then starts to have feelings towards Cole.
- Took a Level in Badass: Once she upgrades to being an official ninja in season 5.
- Wrench Wench: She was always the Ninja's go-to gal for technology, fixing up machines and new vehicles for them to use.
- Voiced by: Paul Dobson
- Badass Grandpa: Old, wise and kicks butt.
- Badass Teacher: He is the one who trained the ninjas to be strong.
- Bash Brothers: With Garmadon from Seasons 3 and 4 onward.
- Big Good: He is a wise old man who is also mentor and master to the six Ninja (Lloyd, Kai, Jay, Cole, Zane, and Nya), as he trained them to be capable of protecting Ninjago from evil forces.
- Cain and Abel: With Lord Garmadon. This was briefly inverted during Season 3 after Wu is subject to an Unwilling Roboticisation. Afterwards, this is subverted because Garmadon never wanted to be evil in the first place.
- Cybernetics Eat Your Soul: He is briefly subject to an Unwilling Roboticisation in Season 3, but gets better.
- Light 'em Up: His element is light.
- Man in White: He has white robes and a white beard.
- Old Master: Along with Garmadon, they're some of the oldest living people in Ninjago.
- Parental Substitute: To the Ninja and Lloyd.
- Red Eyes, Take Warning: During his tenure as Evil Wu thanks to the Overlord.
- Simple Staff: His primary weapon is a bamboo staff.
- Unwilling Roboticisation: Subject to one in Season 3, but he gets better.
Sensei/Master Garmadon, formerly Lord Garmadon
- Voiced by: Mark Oliver
- The Atoner: From season 3 onwards.
- Badass Grandpa: As a Brought Down to Normal (apparently) middle-aged human. He may no longer be in his prime, but he can still kick butt and take names with the best of them.
- Badass Pacifist: Has sworn to never fight after pulling his Heel–Face Turn. This doesn’t stick past season 3.
- The Bad Guy Wins: The pilot episode. He knows Samukai will betray him, so when Sensei Wu takes the Sword of Fire into the Underworld, he has Samukai take the other weapons there, so when they are combined when Samukai does betray him, they will create a singularity which will allow Garmadon to escape the Underworld.
- Being Evil Sucks: Due to being evil due to it literally running through his veins, so he'll always be forced to be evil, but he's aware of this and doesn't truly want to be, particularly where his son is concerned. Gets worse when Lloyd is revealed to be The Chosen One.
- Big Bad: He's the driving threat behind the four part pilot, given how he sent the Skulkin to retrieve the Golden Weapons. After forming an Enemy Mine with the Ninja in Season 1, he returns to this spot in Season 2, at least for the first half.
- Body Horror: Multiple times: glowing eyes, charred skin, four arms, the draconian form the Overlord forced him into, and finally an Anacondrai body, courtesy of Master Chen.
- Jay lampshades this by eventually telling him to pick a body and stick to it!
- Brought Down to Normal: The Overlord's defeat caused all of the evil to vanish from his body.
- Dark Is Evil: He has a black color scheme and is, of course, evil.
- Darth Vader Clone: Badass Baritone? Black color scheme? Wears a helmet? The father of the Messianic Archetype? The Heavy who's actually The Dragon to the actual primary antagonist? ...definitely qualifies.
- Death Glare: He wants Traveler's Tea. The tea shopkeeper tells him that only fools ask for that. Cue the Death Glare.Shopkeeper: *nervous laugh* But you're no fool.
- Demonic Possession: Becomes the Overlord's unwitting vessel.
- Demoted to Dragon: To The Overlord in the (original) final story arc.
- Enemy Mine: In Season 1 he teams up with the Ninja to oppose the Serpentine.
- Even Evil Has Loved Ones: Never stops putting his own life on the line to save Lloyd.
- Evil Old Folks: Albeit an tragic variant. Before his Heel–Face Turn, he intended to reshape Ninjago in his own evil image.
- Evil Parents Want Good Kids: "Once Bitten, Twice Shy" reveals that he didn't want Lloyd to follow in his footsteps.
- Evil Sounds Deep: Played straight when he's trapped in the Underworld, averted after he escapes where his voice is actually quite high.
- Foil: Seems to be set up as one to his brother in season 4. Whereas Wu acts more the part of the enigmatic, weird, slightly aloof mentor towards the Ninja, Garmadon is the actual father of one of them and is much more hands-on, direct, and pragmatic as the Ninja’s sensei. He also knows quite a lot more about the criminal underworld than his brother does, naturally.
- Good Is Not Nice: As one of the good guys, Garmadon is quite pragmatic, although he’s not above pushing the Ninja towards amending their behavior towards fellow Elemental Masters, even if they are on opposing sides.
- Good Parents: Never stops trying to be as good a father for Lloyd as he can be. He remains this post Heel–Face Turn.
- Grumpy Old Man: Towards the Ninja in season 3, and with good reason.
- Heel–Face Revolving Door: As Lord Garmadon, he typically switches to face only when Lloyd is in trouble. It helps he's not evil of his own accord.
- Heel–Face Turn: Turns back into a (good) human upon the defeat of the Overlord.
- Heroic Sacrifice: At the climax of the season 4 finale, he trades places with the Anacondrai generals to allow them to deal with Chen’s army. Garmadon may still be alive, but he’s trapped in the Cursed Realm, currently with no way of getting back home.
- Late-Arrival Spoiler: He’s been one of the good guys for two seasons now.
- Made of Evil: Thanks to the Great Devourer biting him in his youth, it's literally in Garmadon's blood to be evil. In the season two finale, he is finally cured of this after Lloyd beats the Overlord.
- Morality Pet: Even once Lloyd joins the Ninja's side and becomes the one destined to defeat him, he refuses to target him, instead targeting the rest of the Ninja.
- Multi-Armed and Dangerous: His dark form caused him to grow a second pair of arms, each for holding the remaining two golden weapons.
- Nominal Hero: The citizens of Ninjago City didn't hesitate to give Lord Garmadon credit for destroying the Great Devourer, never mind that he did it for revenge and kept the Four Weapons of Spinjitzu for his own purposes. He becomes a real hero eventually, though.
- Only Sane Man: Once he’s human again, his down-to-earth personality contrasts with his brother’s Cloud Cuckoo Lander antics of previous seasons.
- Papa Wolf: Very much so, he brought an entire army to protect his son. Even after he becomes the Big Bad again, he refuses to let any harm befall Lloyd.
- After Pythor and the Overlord kidnap Lloyd, he goes against his vow of peace to fight them.
- In season 4, he joins the Ninja on a quest just to protect Lloyd — and how.
- The Power of Creation: The Mega Weapon he obtains at the beginning of season two has this ability. However, he can only use it once a day and it drains his energy severely with each use.
- Really Dead Montage: Occurs for Lloyd after Garmadon plans to be traded for the Anacondrai generals in the Cursed Realm. Various memories of father and son play along with pretty background music while Lloyd fights Chen’s army in a flurry of fury.
- Red Eyes, Take Warning: As a dark lord, he was this in the pilot and in the first season.
- Silver Fox: Garmadon as a middle-aged sensei is basically what his attractive-for-a-Lego-minifigure son will look like in a few decades.
- Stern Teacher: Is this to Lloyd in Season 3. He's tough on him to get him to reach his full potential, but it's made 100% clear he's only doing it out of concern for his son.
- He’s much more accessible as a sensei in season 4.
- Team Dad: In season 4, Garmadon becomes the Ninja’s hands-on sensei while his brother and his wife repair the Bounty back home.
- Tragic Villain: Unlike some villains, Garmadon does not want to be evil. Luckily, he breaks out of it.
- Unwitting Pawn: Was manipulated by the Overlord into destroying the balance, all so the Overlord could take his body.
- Villainous Breakdown: At the end of the Ninjaball Run, when the Ninja just won't quit and finally win the race, foiling his latest plot.
- Woobie, Destroyer of Worlds: It's hard to deny that he's this. He was forcibly made evil thanks to being bitten by the Great Devourer and now has to fight his own son.
- Yin-Yang Bomb: Combines his own dark power with the Golden Weapons to destroy the Great Devourer.
Dareth the Brown Ninja(?)A cocky kung-fu "Sensei" who allows the Ninja to train Lloyd at his Dojo, entitled "Dareth's Mojo Dojo." He is revealed to have lied about his kung-fu claims.
- Dumbass Has a Point: Jay tries to use the fact that the Ninja saved the city from the Great Devourer as leverage to train at the Dojo, only for Dareth to point out that Garmadon's the one who actually defeated the Devourer.
- Epic Fail: After seeing Lloyd easily destroy ten boards with an elemental chop, he attempts to do it himself with FIFTY boards. He barely has to hit it without screaming in pain.
- The Load: His attempt at stopping the pirates only causes more problems for the Ninja and Lloyd is forced to save him.
- In the season two finale he averts this by accidentally putting on the Helmet of Darkness, giving him control of the Stone Army.
- He averts this again by saving the students from a shark attack.
- Small Name, Big Ego
- Speaks Fluent Animal: Manages to get two sharks to back off.
- Sixth Ranger: He tries hard to make himself part of the ninja by calling himself the Brown Ninja.
Ed and EdnaJay's very eccentric, yet loving parents.
- American Accents: They have a heavy Upper Midwestern accent.
- Amazingly Embarrassing Parents
- Badass Driver: They prove to be this in "Ninjaball Run."
- Body Horror: Get bitten by the Fangpires and not only affects them, but their creations.
- Good Parents
- Screw This, I'm Outta Here!: This is invoked during Season 3, where they casually leave the ninjas behind using jetpacks while nindroids ambush the scrapyard, though they did believe they could handle it. Jay asked for a jetpack, but they don't have one for him because he hardly visits them.
Dr. JulienZane's father, or rather, his creator.
- All There in the Manual: His name has never been revealed in the show, but is mentioned in the LEGO Ninjago Character Encyclopedia.
- Back for the Dead: Averted - he passed away in the Time Skip between seasons 2 and 3.
- Back from the Dead: In "The Last Voyage", the Ninja find him on a prison tower in the middle of the ocean and learn that on his deathbed, he was revived by Samukai so he could design vehicles for the Skeleton Army. It only kept him alive a little longer, as he was still frail and weak.
- Gadgeteer Genius: His achievements include Zane, the Falcon, and a guardian robot, all of which he built from a small workshop in the Birchwood Forest. Later, after being brought back from the dead, he helps design the vehicles for the Skeleton Army. After he is rescued he builds a Power Driller for Cole.
MisakoLloyd Garmadon's mother and Garmadon's wife.
- Action Mom: She can fight as well as she can teach.
- Lady of War: Finds herself dragged into the midst of the battle between ninja and the Overlord.
- Love Triangle: With Lord Garmadon and Sensei Wu.
- Daddy Had a Good Reason for Abandoning You
- Never Mess with Granny: Vague Age notwithstanding, she has graying hair and looked about the same age as Lord Garmadon and Sensei Wu in Wu's photograph. And yet she is amazingly agile, knows Spinjitzu, and has more expertise on the prophecy of the Green Ninja than Sensei Wu himself.
- Wrong Guy First: When looking at a picture of herself and Lord Garmadon when they were young, she tells Sensei Wu "I should have chosen you".
- Battle Couple: With Zane after he gives her half of his power core. Together, they can use Spinjistsu.
- Fun with Acronyms: Her name stands for Primary Interactive X-Ternal Assistant Life-form.
- Grappling-Hook Gun: Has a built in one in her arm.
- Heroic Sacrifice: She helps the ninjas use the EMP to deactivate the nindroids, but it deactivates her as well. Fortunately Zane revives her by giving her half his power core. Her body eventually gets scrapped permanently, but luckily Zane is able to save her by downloading her processor into himself, turning her into a Voice with an Internet Connection. Presumably, Borg could build her another body if given the chance, but he hasn't got around to it.
- Love Interest: She shows interest in Zane and they have some tender moments with each other.
- Red Eyes, Take Warning: When she was under the Overlord's Control. Normally, they're green.
- Ridiculously Human Robot: Though she's a downgraded version of the robot you've seen already.
- Took a Level in Badass: When she's reactivated after her Heroic Sacrifice, she becomes a better fighter thanks to having part of Zane's power core in her.
- Voice with an Internet Connection: Becomes this after Chen's henchmen scrap her body. Zane installs her processor into his upgraded body to save her.
Cyrus BorgThe head of Borg Industries and the creator of P.I.X.A.L. He is brilliant scientist who helped rebuild Ninjago City into the technologically advanced New Ninjago City.
- Brainwashed and Crazy: The Overlord takes control of him after he gives the Ninja the Techno-Blades.
- Cool Chair: He was disabled from birth, so he built his moving chair.
- Cybernetics Eat Your Soul: What the Overlord did to him.
- Electronic Eye: Gains a few after his Unwilling Roboticization.
- Heel–Face Turn: Once he's freed of the Overlord's control, he becomes a true ally to the ninjas.
- Prophetic Name: He jokes that when his parents named him, his career choice was set.
- Tragic Villain: Converted to a cyborg against his will by the Digital Overlord.
- Unwilling Roboticisation: The Digital Overlord forcibly converts him into a cyborg.
RoninHe becomes a recurring character in the series proper by the fifth season, this time as more of a neutral party.
- Anti-Hero: At his first glance, Ronin is a selfish yet skilled thief and bounty hunter. He often took terrible actions, making deals with the evil Soul Archer and selling Zane to Master Chen. However, looking to change his ways, Ronin sided with the Ninja, and oversaw Nya as she tried to master her water element. This proves that he has an sympathetic backstory, as his motivation for in the game was actually to save his cursed soul. Eventually, his more sincere personality comes through in the episode, "Curse World: Part 1," when he arrives in his airship R.E.X. and promptly dumps every amount of money he ever made on the building Morro had lifted with his elemental wind power, giving Lloyd the chance to defeat Morro. From that point on he is the Ninjas' friend and ally.
- Badass Normal: Despite lacking the elemental or magical powers that most of the other characters have, he's still very capable and intelligent, and frequently proves to be a formidable opponent for the main characters when the moment presents itself.
- Captain Ersatz: Without his hat and mask, he is visually similar to Snake Plissken.
- Cool Ship: R.E.X.
- Heel–Face Turn: He becomes an ally of the Ninja in Season 5.
- Only in It for the Money: He isn't interested in power, just money. It is eventually revealed that he needs so much money due to a debt he has towards Soul Archer.
- Wild Card: Though he considers himself to be a friend of sorts towards the Ninja, he will oppose them if offered a high amount of money.
Ray and MayaKai and Nya's parents, and the original Elemental Masters of Fire and Water.
- Daddy Had a Good Reason for Abandoning You: They were forced to forge armor for the Vermillion Warriors under the threat that Krux would harm Kai and Nya if they refused. This left them absent from their children's lives for many years.
- Making a Splash: Maya had this power before passing it on to her daughter.
- Playing with Fire: This was Ray's element before it became Kai's.
The Elemental Masters
The descendants of the original elemental masters who fought alongside the First Spinjitsu Master and are currently apart of Master Chen's Tournament of Elements.
KarlofDescendant of the Elemental Master of Metal.
- Extra-ore-dinary: Use his elemental power to turn his skin to metal.
- Power Fist: Wields a pair of metal fists for battle.
- Husky Russkie: Seems to be from there or whatever the Ninjago equivalent is.
- Third-Person Person: Does this quite a bit.
- Took a Level in Kindness: In his first two appearances he acted like a jerkass, but is seen trying to help the others survive there situation and even made a diversion so Cole can talk to Zane.
NeuroDescendant of The Elemental Master of Mind.
- Skunk Stripe: His hair sport this.
- Telepathy: His power
- Token Evil Teammate: Knows about Master Chen's plans, but sided with Camille's group during Thunderblade race as he wanted to side with the winner.
SkylorShe is the Elemental Master of Amber.
- Chekhov's Skill: Turns out her powers make it so she herself can be used in Chen's spell when the staff is destroyed.
- Daddy's Little Villain: Lord Chen is her father
- Fiery Redhead: More subdued, but she isn't one to mince words.
- Foreshadowing: She is dressed in a ninja outfit. She foreshadows the sixth Ninja being female.
- High-Heel–Face Turn: Begins to legitimately fall for Kai, and after her father shows little concern for her life, she joins Kai in his plan to trick Chen.
- Irony: Her power is the same as what her father is trying to achieve with the staff, except the person she gets her powers from keeps theirs.
- The Mole: Gets close to the ninja on orders from her father, Master Chen.
- Power Copying: As noted above She is the Elemental Master of Amber which allows her to copy the elements of other Elemental Masters.
GravisThe Elemental Master of Gravity
- Gravity Master: His power allows him to move things like telekinesis.
Jacob PevsnerThe Elemental Master of Sound.
- Afro Asskicker
- Handicapped Badass: He appears to be blind and rely on his ability with sound to create echolocation to fight.
ShadeThe Elemental Master of Shadow
- Dark Is Not Evil: Considering shadow is a dark element and he became an ally to the Ninja.
- Jerk with a Heart of Gold: Not the nicest guy, but becomes a good ally to the ninja...eventually.
PalemanAlso goes by Mr. Pale. He is the Elemental Master of Light. Like Toxikita He originally came from Ultra Agents and was called Invizable.
- Adaptational Heroism: In Ultra Agents, he was one of the super-villains. Here when told the truth about Master Chen, Not only did he join in Lloyd defense. He was the first to say he will drop out of the tournament if Lloyd gets kicked out.
Griffin TurnerThe Elemental Master of Speed
AshElemental Master of Smoke.
BoloboElemental Master of Nature.
ToxShe is the Elemental Master of Poison. Like Paleman she originally came from Ultra Agents.
- Hollywood Acid: One of her powers
- Those Two Girls: Frequently seen with Camille, in fact when Camille is eliminated Toxikita is eliminated off screen in the beginning of the next episode.
CamilleElemental Master of Form.
The Skeleton Army
SamukaiThe four-armed King of the Underworld. He was defeated by Lord Garmadon when he was banished to the Underworld, causing him to step down and allow Garmadon to control the legions of the Underworld. Samukai leads the Skulkin Army in the Surface World of Ninjago, carrying out Garmadon's orders and seeking the Golden Weapons of Spinjtizu. Soon, Samukai possessed the four weapons and betrayed Garmadon, only to be vaporized by the power of the weapons combined. His choice of weapons are four bone daggers he uses because of a mutation that granted him four hands, making him superior to all skeletons.
- The Dragon: Leads the Skulkin and reports directly to Garmadon.
- Expy He looks similar to General Grievous. He even has similar fighting moves and four arms.
- Red Eyes, Take Warning
- Multi-Armed and Dangerous
- The Starscream: Desires to overthrow Garmadon and reclaim his spot as King of The Underworld. And it fails horribly, ending with him being vaporized.
Nuckal and KrunchaA duo of dull-witted Skullkins who serve as the Lightning and Earth Skeleton General respectively.
- Guttural Growler: Kruncha has a harsh and gravelly voice to contrast with Nuckal's high-pitched voice.
- How Do I Shot Web?: Suffers this while trying to use the Golden Weapons.
- Psycho Electro: Normally Nuckal's more stupid than insane/sadistic, but has a habit of mad cackling and enjoys nothing more than smashing things.
- Recurring Extra: He and Kruncha become this in the 2012 episodes.
- Those Two Bad Guys
- Too Dumb to Live: Nuckal bites into a donut-shaped rock to see if it tastes like a donut. Good thing he's already dead.
- Moreover, in the short story "The Choice", Zane manages to convince Nuckal that he was never there by telling him that Nuckal was just remembering a funny joke Samukai told him earlier. The fact that he actually thought Zane's joke was funny highlights his gullibility.
The first antagonists of the show, the Serpentine are Snake People who initially plotted to unite the five tribes and release the Great Devourer in order to get revenge on the humans that locked them underground.
HypnobraiThe Hypnobrai are a blue-colored faction of the Serpentine. As their name implies, they use hypnosis. They are the first tribe to be released.
SkalesSnake General of Ice and commander of the Hypnobrai Tribe. Formerly Slithraa's second-in-command, He took his place as General after defeating him in the Slither Pit.
- Big Bad Wannabe: After becoming the Snake King, he leads the other Serpentine in an attempt to bury Ninjago City underground. However, he ends up releasing the Stone Army and his forces are easily defeated by them.
- The Dragon: To both Slithraa and Pythor.
- Dragon Ascendant: He planned on becoming the new leader of the Serpentine after Pythor was eaten by the Great Devourer, but Lord Garmadon wins their trust before he does and leaves him with only the other Generals.
- Heel–Face Turn: In the later episodes, after getting a wife and a kid.
- Monster is a Mommy: Has a son in the time between the Overlord's defeat and his return in digital form.
- The Starscream: He wanted to dethrone Pythor, Garmadon, and the ninja in one fell swoop, but failed. He was certainly this to Slithraa and managed to pull it off.
- Sour Supporter: Formerly one of Lord Garmadon's, but with heavy emphasis on the sour part.
- Sssssnake Talk: More so than all the other Serpentine.
- Surrounded by Idiots: Often, with the other Serpentine.
SlithraaSnake of Ice and Warrior for the Hypnobrai Tribe. When Lloyd stumbled upon the Hypnobrai, Slithraa attempted to mind control him but ended up controlling himself, thus allowing Lloyd to take over the Hypnobrai tribe, much to the dismay of the others. He was formerly general of the tribe, before Skales took his place after defeating him in the Slither Pit.
- Brought Down to Normal: His fate after losing the Slither Pit duel with Skales.
- Dragon-in-Chief: To Lloyd when he had control of the Hypnobrai, as the only reason he had any authority among them was because Slithraa was the General. When Skales defeats him and takes his place as leader, Slithraa loses all authority over the Hypnobrai and Lloyd is banished.
- Hoist by His Own Petard: Lloyd gets him to obey when Slithraa tries to hypnotize him and it bounces off an ice wall, hypnotizing himself.Lloyd: No. I will control you from now on.
- Put on a Bus: After Skales takes his place as leader, Slithraa begins appearing less frequently. "The Snake King" is the last episode he appears in before disappearing entirely, and that was only a cameo appearance on (appropriately enough) the Snake Bus.
FangpyreThe Fangpyre are a red-colored faction of the Serpentine. Their poisonous fangs can convert machines into living biomechanical snake-themed vehicles or mutate organic lifeforms into snakes. They are the second tribe to be released.
AnacondraiThe Anacondrai are a purple-colored faction of the Serpentine. They have the power to turn invisible. When they were locked away their was a lack of food so they turned cannibal until only Pythor was left. According to Skales they are the most feared tribe. They were the third tribe to be released.
Pythor P. ChumsworthLast snake of the Anacondrai Tribe. Sensai Wu reveals Pythor is their most dangerous enemy yet. He plans to unite the five Serpentine tribes to find the four Silver Fang Blades and unleash the Great Devourer. He's ultimately eaten by the Great Devourer, later returns to free the Overlord from his digital prison, then gets shrunk and stuck in an alliance with the ninja to fight Master Chen.
- The Bad Guy Wins: An interesting case. He succeeds in unsealing the Great Devourer, but gets eaten by it soon after. He still technically succeeded in his goal.
- Big Bad: While the five tribe leaders were on even footing at first, he eventually manipulated his way into this role in season 1.
- Bitch in Sheep's Clothing: He pretends to be Lloyd's friend while in truth he only used him so he can get the map.
- Card-Carrying Villain: Slightly, he doesn't exactly say he is evil but its obvious he knows what he is doing to other people and seems proud of what he does to the ninjas.
- Colonel Badass: Until The Great Devourer shows up.
- The Chessmaster: He played Lloyd like a fiddle, stole three of the fangs easily, and waited for the Ninja to arrive with the fourth.
- Disc-One Final Boss: He's the Big Bad for most of Season 1, only to get overshadowed in the final episode.
- Dragon-in-Chief: Becomes this to the Digital Overlord, given how it was trapped on a hard drive. Subverted when the Overlord sucks out Lloyd's energy and becomes the Golden Master.
- Enemy Mine: Forms one with the heroes to battle Master Chen.
- Evil Albino: Being eaten sucks away his skin pigmentation.
- Evil Brit: Has a semi-British accent, for whatever reason.
- Evil Is Not a Toy: Finds out too late that the Great Devourer will eat the Serpentine along with everything else, and becomes its first victim.
- Faux Affably Evil: Speaks politely, but is ultimately a
- Hoist by His Own Petard: When he awakens the Great Devourer he's one of its first victims.
- Heel–Face Revolving Door: Helps the ninja in season 4, mainly because he hates Chen more than the ninja and can't stand Chen's plan to make Fake Androcandai. He goes back to his evil ways in "Day of the Departed".
- I Am A Humanitarian: Ate one of the judges at a dancing so he could replace him as part of a plan to get one of the Fangblades.
- Kneel Before Zod: His first act after taking over the other tribes in a Slither Pit is order all the Serpentine to bow before him.
- Last of His Kind: Is the last of the Anacondrai. He's implied to have ate the others!
- Light Is Not Good: His skin bleached into white after being freed from Great Devourer and wears white clothes, but is still on the side of evil.
- Long Neck: Being an Anacondrai, he has a rather long neck.
- Manipulative Bastard: Pretended to be Lloyd's friend so he could steal his map leading to the other Serpentine tombs.
- No Party Like a Donner Party: It's implied he ate the rest of his kind to survive while locked in the tomb.
- Not Quite Dead: He survived being eaten, but not without becoming an Evil Albino.
- One-Man Army: Defeated all the serpentine generals at once, and by himself.
- Proud Warrior Race Guy: He has a lot of respect for his species, and Chen's treatment of their memory pisses him off to the point that he willingly sides with the ninja.
- Soft-Spoken Sadist: Is very polite in his speech, but it's rather clear he's a monster who relishes the suffering he inflicts.
- Villainous Breakdown: He freaks out when he discovers that the Great Devourer isn't under his control.
- Villain Team-Up: Steals the Overlord's hard drive and allies with him.
ConstrictaiThe Constrictai are a black and orange-colored fraction of the Serpentine. They can dig underground to ambush their enemies, and have a fierce grip. They are the fourth tribe to be released.
VenomariThe Venomari are a green-colored cobra/viper-themed faction of the Serpentine. Their toxic venom can make anyone hallucinate. They are the fifth and final tribe to be released.
- Extra Eyes: Most of the Venomari have four eyes, with the exception of Lasha, who appears to have lost a few.
The Great DevourerAccording to a legend, once all five Serpentine tribes unite, they will be able to find the four Silver Fang Blades and unleash the "Great Devourer". The Fang Blades are said to enhance the Devourer's abilities and make it unstoppable, releasing a terrible evil that will turn day into night. According to Sensei Wu, it will keep growing as long as it consumes. Garmadon was nice until he got bit by the Devourer as a child, turning him into the villain he is today.The Devourer slept under the Lost City of Ouroboros until Pythor put the Fang Blades into the statue of it and it rose out from underneath the city. It was destroyed by Lord Garmadon with the power of the Golden Weapons of Spinjitzu.
- Attack Its Weak Point: Has one on the top of its head. Garmadon kills it by diving off the top of a building with all four Golden Weapons and attacking this weak point.
- Eldritch Abomination
- Extreme Omnivore
- Greater-Scope Villain: For Season 1, as it was the goal of Pythor to release it. The Devourer was also responsible for biting Garmadon and triggering his Start of Darkness, making him the Greater-Scope Villain of the 4 part pilot as well.
- Hoist by His Own Petard: It bit Garmadon and turned him evil in the first place. It's ultimately Garmadon who destroys it.
- It gets better: if Lord Garmadon hadn't become evil, he never would have sought the power to wield all four golden weapons. The only way to kill the Devourer? Strike its weak spot with all four golden weapons at once.
- Make My Monster Grow: The more it eats the bigger it gets.
- Omnicidal Maniac: Its goal is basically to eat everything, even its Serpentine worshipers.
- Sealed Evil in a Can: Was sleeping under the lost city of Ouroboros until Pythor placed the Fang Blades back in their proper place, releasing it.
- Start of Darkness: Described in the fourth graphic novel:"Once, when the world of Ninjago was new, all things were bright and peaceful. Farmers toiled in their fields, in harmony with all the creatures of land, sea, and air. But in all things, there must be a balance. And so darkness crept upon the land, and came upon a lone snake in the grass."
The Overlord's Army
The OverlordAn ancient evil from Ninjago's past that fought with the first Spinjitzu master in the past. He helps Lord Garmadon turn Ninjago into his own image, but later betrayed him and took over his body. His body is ultimately destroyed by Lloyd in the Final Battle with him, but he now lives on as an evil AI.
- A.I. Is a Crapshoot: Becomes an AI in Season 3.
- As Long as There is Evil: During the final battle, he gives a speech, saying 'as long as there is light, there must always be shadow,' implying he's this trope. Considering having a massive explosion go off INSIDE HIM and destroy his physical form wasn't enough to kill him (though it probably would've put him out of commission for a good while had Cyrus not accidentally resurrected him), he probably has a point.
- Big Bad: Looks to be the Biggest Bad in all of Ninjago. Specifically though, it's the primary threat for the second half of Season 2 and for all of Season 3.
- Big "NO!": Gives a series of them upon realizing Lloyd is about to destroy him.
- Clipped-Wing Angel: When the ninja botch his attempt to regain his physical form by siphoning Lloyd's golden power, he returns in the form of a purple blob. Once he's stable enough, however...
- The Corrupter: His dark matter has the ability to turn whatever it touches evil. He also makes Garmadon worse and worse through his manipulations. He's also the being responsible for creating the Great Devourer and thus turning Garmadon evil in the first place.
- Devour the Dragon: The Overlord eventually betrays Lord Garmadon and possesses his body.
- Eldritch Abomination: Has many qualities of one.
- Eviler Than Thou: To Lord Garmadon when it hijacks his body.
- Evil Sounds Deep: After taking over Garmadon's body it gains a deeper voice.
- Knight of Cerebus: Is about the only villain in the entire series (at least the only one with a mind of its own) with absolutely no comical traits at all, and the leader of an army of Nigh Invulnerable soldiers at his command.
- Idiot Ball: Usually a relatively adept manipulator, he sometimes fails to see the easier option when caught up in his own schemes. He insists on reclaiming his original body. As his computerized state potentially grants him whatever body or even bodies he wants, this is probably a case of this trope.
- Of course, since he requires electricity to function in his digital state, and the ninja have the Technoblades, which are capable of stopping, and perhaps even destroying, him while he remains in the system, he may have a valid point for regaining corporeal form. He also wants to skip finding a host that can fight from the inside this time.
- The process would also have the benefit of making him even more powerful.
- Light Is Not Good: His Golden Master incarnation, both times.
- Literally Shattered Lives: Zane defeats him the second time by absorbing his power and freezing him until this happens.
- Manipulative Bastard: Manipulated Garmadon into think he was the Big Bad, so he'd complete his ultimate weapon and disrupt the balance between good and evil, freeing the Overlord from his prison.
- One-Winged Angel: After taking over Garmadon's body, he takes the form of a gigantic black dragon.
- When the Ninja confront him in the digital world, he becomes a giant vaguely humanoid...thing made of darkness with numerous tentacles.
- Once he returns to full power as the Golden Master, his power takes on the level that he had in the digital world... in reality.
- Our Dragons Are Different: His true form is a giant black dragon.
- Pyrrhic Victory: He manages to escape the digital realm, but is unable to drain all of Lloyd's power and can barely keep his new body together.
- Satan: Pretty much the Ninjago version anyway. Is it any wonder he turns into a dragon for the final battle?
- Sealed Evil in a Can: The Overlord and the evil side of Ninjago which he inhabited were supposed to remain disappeared for as long as the balance between good and evil remained in check. However, Lord Garmadon's ambition to remake Ninjago in his image upsets that balance.
- Due to losing his body in the final battle with Lloyd, his soul is stuck in machines, and while that gives him a lot of stuff to control he still wants a new body instead of being stuck in a computer. He eventually gets it.
- This Cannot Be!:
- Is left in disbelief when Lloyd begins to fight back against him, unable to believe a mere human could manage to match him.
- Happens again when Zane pulls off his Heroic Sacrifice, absorbing the Golden Master power to ultimately defeat him.
- Ultimate Evil: Spends most of his screen time a disembodied voice considered to be the most evil entity in the entire series. When he finally appears in person, he's as frightening and powerful as he was made out to be. Both times.
- Worf Had the Flu: The only reason Lloyd managed to stand any chance at all in their first fight was because Garmadon was Fighting from the Inside, and even then, the Overlord beat him and left him with an injured leg. Even after Lloyd obtains his Golden Super Mode, the Overlord is able to fight him fairly evenly.
General KozuThe General of the Stone Army created by the Overlord and Lord Garmadon's personal translator.
- The Dragon: To Garmadon and the Overlord.
- Multi-Armed and Dangerous
- Translator Buddy: Acts as this for Lord Garmadon, being the only member of the Stone Army that can speak the Ninjago language.
- Verbal Tic: "GLUTAVU?"
The Stone Army
- Badass Army: An army of Nigh Invulnerable soldiers.
- Doom Troops: Nearly invulnerable and incredibly formidable, they stand out as being some of the fiercest Mooks in the series.
- Implacable Man: Nothing the Ninja hit them with can do more than slow them down until the Ninja get their upgraded elemental powers.
- Nigh-Invulnerability: Aren't called the 'indestructible Stone Army' for nothing. Turns out they have one weakness; the Ninja's pure elemental powers obtained at the temple of light.
- Sealed Evil in a Can: Were sealed underground with the defeat of the Overlord, but unleashed by the Serpentine accidentally unearthing them.
- Bad Boss: General Cryptor towards the other Nindroids, specially towards Min-Droid.
- The Dragon: Cryptor leads them and reports directly to the Overlord, until Pythor enters the picture.
- Eye Beams: They can fire lasers from their eyes.
- Eyepatch of Power: All of them have one eye covered up.
- Invisibility Cloak: Have a built-in one that allows them to move around hidden.
- Literally Shattered Lives: General Cryptor and Min-Droid.
- Mecha-Mooks: They are all robots and the Overlord's new set of minions.
- Mini Mook: One Nindroid is much smaller than the rest (apparently due to a lack of material). He is appropriately nicknamed Min-Droid.
- Mistreatment-Induced Betrayal: In "The Titanium Ninja" Min-Droid gets fed up of General Cryptor's belittling and fights him.
- Replacement Mooks: Replace the Stone Army as the Overlord's footsoldiers.
Master Chen's cultists
Master ChenAn old master who organizes a tournament for the descendants of the elemental masters. He convinces the ninjas to participate as he knows the whereabouts of the supposedly deceased Zane.
- Beware the Silly Ones: He brings a lot of funny moments to the series, but he's still evil.
- Big Bad: Of Season 4. His goal is to steal the powers of the Elemental Masters so he could perform a spell that would turn him and his followers into Anacondrai so he could invade and conquer Ninjago.
- Elemental Absorption: His staff does a form of this, stealing the elemental powers of those who lose in his tournament.
- Evil Is Hammy: He is definitely this.
- Evil Mentor: To Garmadon, decades ago.
- Expy: To Shang Tsung from the first Mortal Kombat game, as an old sorcerer who brings warriors in a sailboat to his island, to fight in a tournament for his own evil goals.
- Green-Eyed Monster: Jealous of those born with powers, which is why he set up the tournament.
- Psychopathic Manchild: "Maturity" is not in Chen's dictionary, as he frequently insults his guests and cultists and throws a tantrum when his attempts to cheat are exposed.
- Reptiles Are Abhorrent: He and his men have a snake motif or, more specifically, an Anacondrai motif. Which is fitting as he sided with the Serpentine during the war against them.
- Averted later when its revealed he played both sides hoping they will destroy one another, and lies to make sure peace could never happen. His desire to become an Andorcondai is purely physical as he scoffs at their more noble traits and culture.
- The Dragon: He is Chen's right-hand man. He is one of the masterminds of the plan to lure the Elemental Masters to their demise.
- Evil Sorcerer: Has shown the ability to cast spells.
- Hoist by His Own Petard: When Garmadon and him fight, he opens up a portal to the Cursed Realm in the hopes of trapping Garmadon there. Garmadon not only ends up escaping, but also pushes him in instead.
- The Rival: He was Chen's disciple alongside Garmadon, and clearly resents Garmadon.
- The Undead: He becomes a ghost after his escape from the Cursed Realm's destruction.
EyezorA punk who leads Chen's thugs.
- Bad Boss: He is pretty mean to Chop and Kapow, admittedly they were talking bad about him first.
- Elite Mook: Leads the other mooks and seems to be third in command
Chope and KapauA pair of guards with dreams of greatness.
MorroThe leader of the army. A former student of Sensei Wu banished to the Cursed Realm. He gets free when Garmadon sacrifices himself and possesses Lloyd during "Winds of Change", spending most of the rest of the season in his body.
- A Pupil of Mine Until He Turned to Evil: He was Wu's first student, until he left to prove that he was worthy of being the Green Ninja.
- Barred from the Afterlife
- Blow You Away: The Elemental Master of Wind.
- Demonic Possession: Spends most of the arc in Lloyd's body.
- Dragon-in-Chief: Is the servant of the Preeminent, but she's still sealed away and thus her influence is limited.
- The Heavy: He does all the work throughout Season 5. To start, he possesses Lloyd Garmadon, as only a Spinjitzu Master could locate the tomb. He then embarked on a quest, during which he used the Allied Armor of Azure to conjure allies from the Cursed Realm at will. After a long journey, Morro obtains the Crystal, and summons his master, the Preeminent, in an effort to curse the Sixteen Realms.
- Karmic Death: Dragged to his death by the very evil he unleashed.
- Redemption Equals Death: When the Preeminent is performing a Taking You with Me with Morro, Wu tells Morro to take his hand. Morro, realizing the error of his ways, refuses, and instead gives Wu the Realm Crystal, so Wu may bring back Lloyd.
- Token Good Teammate: During the special "Day of the Departed", he's the only resuscitated villain who doesn't attack his target and instead helps the ninja. He did go through his redemption already, so this isn't surprising.
WraythThe first ghost that Morro summons. He turns a normal motorcycle into his huge personal cycle and uses a chain in combat.
- Badass Biker: Good for him that Morro summoned him at a biker bar, since it allowed him to quickly find a ride.
- Back for the Finale: After getting killed in his debuting episode, he's later resurrected by Morro in the two-part season finale to help guard the Realm Crystal.
- Back from the Dead: As stated above.
- Chain Pain: Bears the title of Chain Master and wields one with a staff grip and ghost blade.
- Cool Bike: His Chain Cycle.
- Expy: Of Ghost Rider.
Soul ArcherA ghost armed with a bow, who has a grudge against Ronin.
- Archer Archetype: A variation of the trope, since his arrows become creatures named Skreemers.
- Family-Friendly Firearms: His arrows don't kill people, they just transform whatever or whoever they hit into ghosts.
- Rhymes on a Dime: "Run, run, run away! My arrow will find you anyway!"
- Big Eater: Many of the ghosts are this, but Ghoultar is a stand out example.
- Dumb Muscle
- Sinister Scythe
- Make Me Wanna Shout: She can emit a sonic scream, even with her mask on.
- Master Swordsman: Called the Blade Master and wields swords.
- Big Bad: The leader of the Ghost Army. While she's imprisoned, they're still acting on her plan.
- Dimension Lord: Of the Cursed Realm, thus her title 'The Queen of the Cursed.'
- According to Garmadon, she is the Cursed Realm. Destroying her will destroy the realm as well.
- Eldritch Abomination: Even more so of one than the Overlord.
- Genius Loci: A living, sentient dimension.
- He Who Must Not Be Heard: Is stated multiple times to be sentient and a cool-headed planner, and clearly communicates with Morro, but never speaks at all in the show, presumably to make her an even more foreign and mysterious presence.
- The Last of These Is Not Like the Others: Is the only female Arc Villain.
- Meaningful Name: Her name generally means 'above others' or 'the supreme'. She's the ruler of the Cursed Realm, and one of the single largest threats in the series thus far.
- Multiversal Conqueror: She wants to conquer all 16 realms.
- Non-Standard Character Design: Is notably much less LEGO-like than the rest of the setting in her true form, making her Eldritch Abomination nature all the more noticeable.
- Respawn Point: Acts as this for her minions, being the Cursed Realm.
- Sealed Evil in a Can: Is imprisoned in another dimension.
- Silent Antagonist: Never speaks a word (though deep, alien grunts can be heard from time to time).
- Super Drowning Skills: How she meets her demise.
- Toyless Toyline Character: She's one of the very few Ninjago villains to not actually have a set devoted to her, constructable or otherwise.
- The Voiceless
- Big Bad: Of Season 6. He sets off to claim the Realm Crystal and reunite his crew. Likewise, he plans to marry Nya so he can grant himself unlimited wishes.
- A Father to His Men: Subverted in the final episode of Season 6, "The Way Back".
- Even Evil Has Loved Ones: He genuinely seemed to love his father and is distraught when he and his kingdom disappear. Also, Dilara.
- Hook Hand: Fitting for the captain of the Sky Pirates.
- It's All About Me: In "The Way Back", when he acquires infinite wishes after marrying Nya.
- Jackass Genie: Besides the typical twisting of wishes into something harmful for the wisher, Nadakhan also hurries the wishers into having the third wish and then traps them inside the lamp, and later the sword.
- Last of His Kind: Presumably after Djinnjago falls with the Cursed Realm.
- Manipulative Bastard: Exploits the fears of the wishers in order to panic them into making a third wish so he can trap them.
- Multi-Armed and Dangerous: He has four arms,but only three have hands at the end, the other having a hook.
- No Sense of Personal Space: He frequently gets up in his victims' faces when taunting them, or pressuring them to make a wish. It's particularly evident with Jay and Nya.
- Ambiguously Human: He has two faces that look like Kabuki masks, and never speaks.
- I Know Kung-Fu: Turns out he can do Spinjitzu.
- Motor Mouth: Was once this before Nadakhan got his hands on him.
- Was Once a Man: He was once this and even had a regular face, then he decided to rob Misfortune keep.
- Lady Looks Like a Dude: She's no different from male bigfigs from other Lego themes, but she is a female.
- Was Once a Man: She use to look much more human but when Nadakhan offer his assistance she decided to get a new more stronger form.
- The Dragon: Nadakhan's first mate.
- Improbable Aiming Skills: With antiquated weaponry, no less.Nadakhan:Is your powder dry?(Flintlocke whips around and fires 4 shots into a flock of gulls; none of them are hit).Nadakhan: You missed.Flintlocke: Did I?(The top promptly falls off of the palm tree behind the gulls)
- Fusion Dance: A forced one between the human named Monkey Wrench and an actual monkey, courtesy of Nadakhan.
- Was Once a Man: The website says he was the ship's mechanic, before he made the mistake of wishing to his boss to have more hands and be faster.
Squiffy and Bucko
The Time Twins and the Vermillion Warriors
The Time Twins
- Big Bad Duumvirate: Of Season 7. Krux and Acronix intend to travel back in time to defeat the original Elemental Masters.
- Foolish Sibling, Responsible Sibling: The Responsible to Acronix's Foolish. While Acronix is busy fiddling with his BorgWatch, Krux is the one formulating plans.
- Time Master: Along with his brother, he has the ability to control time.
- What the Hell Is That Accent?: His Dr. Saunders voice is...odd, to say the least.
- Fish out of Temporal Water: Having been lost in the time vortex for 40 years, he's a bit behind on modern technology. However, he is absolutely fascinated by it.
- Time Master: Has power over time, just like his brother.
- The Dragon: Since she's the most competent out of the three commanders, she's essentially this to Krux and Acronix.
- Hive Mind: Like the other Vermillion commanders, she can control the other warriors with this.
- More Deadly Than the Male: She is one of three Vermillion commanders specially bred for aggressive fighting style and strategic thinking. It's what gets her promoted to Supreme Commander.
- Red Eyes, Take Warning
Commander Raggmunk and Commander Blunck
Shapeshifting MonstersAn evil species of shapeshifters from the Underworld that serve as the antagonists of the second graphic novel (Mask of the Sensei).
- Bluff the Impostor: One of the shapeshifters impersonates Sensei Wu, but Zane, Jay, and Cole realize their Sensei is a fake when Cole asks if he wants a cup of tea. The real Sensei Wu would of course agree; the shapeshifter who took his place claims to hate tea.
- Master of Disguise: The shapeshifters can mimic anyone from the memories of those they encounter.
- No Name Given: The species is so old that its name has been lost to history.
- Rage Against the Reflection: No mirror-smashing here, but seeing their own reflections is the shapeshifters' one weakness.
- Sealed Evil in a Can: One of the important functions of the Skeleton Army was to keep these monsters from escaping the Underworld and entering Ninjago. Then Lord Garmadon sent the Skeleton Army to attack Ninjago instead. Oops.
- Super Smoke: The shapeshifters' true form.
Ronin (Shadow of Ronin)The main antagonist of the non-canon videogame Ninjago: Shadow of Ronin.
- Badass Normal: Despite lacking the elemental or magical powers that most of the other characters have, he's still very capable and intelligent, and frequently proves to be a formidable opponent for the main characters when the moment presents itself.
- Captain Ersatz: Without his hat and mask, he is visually similar to Snake Plissken.
- Cool Ship: R.E.X.
- Heel–Face Turn: He becomes an ally of the Ninja in Season 5.
- Only in It for the Money: He isn't interested in power, just money. It is eventually revealed that he needs so much money due to a debt he has towards Soul Archer.