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“I finally get it now. My anger at you rocks is really my anger at myself! But I shouldn't be mad. This rock body is a gift. I'm going to use it to destroy Jestro and the Cloud of Monstrox and any other evildoer who stands in my way. They say revenge is a dish best served cold. And I am very cold. And I am very, very hungry.”
— Clay in "The Stranger in the Halps"

Sir Clay Moorington is an orphan from Dnullib and a Nexo Knight of the Moorington family. Abandoned as a child by his sorceress mother Wanda Moorington, he was taken into the care of Merlok, a sorcerer and magician. He gained an appreciation for knighthood and chivalry and entered the Knights' Academy. In his younger years, he befriended a young jester named Jestro.

He joined his teammates, the Nexo Knights, in graduating from the Academy. He attempted to save his father figure Merlok from Jestro, now turned evil, and the Book of Monsters, but failed. He nearly gave up being a knight before Merlok was uploaded into the system, making him digital.

After going through many adventures, he was able to obtain the Book of Betrayal, but eventually betrayed the Knights and traded the Book for Jestro. However, he was then nearly sacrificed to become Monstrox's human form, but he was able to use Techcalibur and destroy Monstrox.

While hiding from Monstrox, now reborn as the Cloud of Monstrox, he was struck by his lightning and began his transformation to stone. During this time, he began training Aaron Fox to become his new replacement as the leader. He fully turned to stone when trying to save Queen Halbert from his then-unknown mother.

After being found as a statue, the Knights kept him on the Fortrex, wanting to follow in his example. However, Monstrox was able to electrocute him, transforming him into the Gray Knight, a villain who served Monstrox. When attempting to destroy the Knights, Merlok struck him with a powerful spell, causing him to lose the evil inside him.

Because of his anger issues, the Knights accidentally drove him away, causing him to attempt meditation, but failing. He also had an inability to hurt Ruina Stoneheart, a sorceress, before realizing that she was his mother. Devastated, he placed himself in a solidarity chamber to protect anyone, but when Macy reopened the chamber, he managed to self-sacrifice himself.

After awakening thanks to his newly-found magic abilities, he used his magic to assist in battling the Stone Colossus. He downloaded Nexo Powers into himself and was able to control the Fortrex to hit the heel of the Colossus, destroying it.

After their victory, Clay's magic was generally hard to control, causing issue to the Knights during their battles. Because of this, Clay set off on a journey of self-discovery to the original meeting location of the Wizards' Council.[2]


Main article: Clay Moorington/History


Clay has spiky, brown hair. He has thick eyebrows and is usually seen with a serious expression. Other than that, his defining facial features remain limited. He often wears dark blue or blue armor fitted with darker blue highlights.

In the third season, Clay slowly begins to turn to stone. His body slowly becomes grayer and stiffer, and he is seen mostly in his Battle Suit. In "Hot Rock Massage," his condition worsens to the point where only his head isn't stone. In "In Charge," he completely turns to stone.

In the fourth season, he is reborn as the "Gray Knight," with his eyes turning yellow to show that he is evil/angry. He is later removed of the evil for a bit. His hair also turns blue in the process.

After being reborn in "March of the Colossus," his hand becomes imbued with blue magical energy coursing through his veins.


Often referred to as the "uptight knight," Clay's defining characteristics are that he likes to be organized and dedicated to knighthood. Though sometimes coming across as somewhat reserved, Clay is also quite emotionally-driven, and values justice above all. He can be shown to be somewhat shy, embarrassed, nervous, or otherwise bashful when he is shown on the big screens unexpected in public. But when it comes to interviews, he can also show to be brave and daring to answer the questions asked. He states that he has based his entire identity on The Knight's Code and its values.

Though usually confident in his abilities and skills, sometimes to almost arrogant degrees at times, he has a fear of failing to save somebody,[3] especially in failing to uphold the values of the Knight's Code. Obsessed with training, he prefers to spend every waking hour either training and preparing for battle, or actually battling the forces of evil. He only sleeps 2 hours a day.[4] He is commonly seen training in the Holo-Gym despite it being 5:30 am in the morning.[5]

Valuing hard work and practice with a need to micromanage and lead, this often causes Clay to butt heads with Lance often due to their conflicting values and beliefs. However, even though they don't always quite see eye-to-eye, the two respect each other.

Clay can also often be seen trying to hide a smile when Lance is cracking a joke or making a pun, or sometimes even joining along with his antics, implying they share a similar, corny sense of humor. Similarly, he usually disapproves Aaron's childish and immature behavior. But despite that, the two are quite good friends and Clay can see the potential within Aaron and asked him to become his successor temporarily when he is absent.

Weapons and abilities

In battles, Clay is a skillful knight, with a unique fighting style against his enemies. Clay is also trained in using swords in battles, making him a great swordsman. Clay also has a shield that he can use to download Nexo Powers.

As a Stone Monster, Clay displays incredible aggression in battle and has easily improved his battle skills. He is able to quickly disintegrate Stone Monsters with a swing of his sword and showed great physical strength, able to destroy Confounding Confusion with a swift punch.

Clay has an incredible ability with magic and is even more powerful than his mother or uncle.[6] However, using the magic within him seems to wear him out physically, as he was too drained to join into battle after being released from his magic stasis.[7] However, he was able to figure out how to download the Nexo Powers data from the system into himself.[8]






Official descriptions


Clay is all about being a knight. He grew up as an orphan and spent every day striving to become one. Now that his dream has come true, he spends every day training his moves, learning new skills or fighting evil. And when he finally sleeps, he dreams of all the heroic deeds he will perform tomorrow.[9]


As Clay grew up, he dreamed every day of becoming a NEXO KNIGHTS hero. Now he is the leader of the NEXO KNIGHTS team, the knightliest knight in the kingdom and the most dedicated defender of the realm. He has just been instrumental in destroying the Book of Monstrox, rescued his friend Jestro from evil and been hailed by the King and Queen. So now he can rest... Ha ha, very funny. Clay never rests. He knows that evil never sleeps. And if evil really does sleep, Clay is sure it is never more than a power nap. So now Clay is a teacher at the Knights Academy, training the next generation of NEXO KNIGHTS heroes. Clay expects a lot from his students and he is a hard teacher. Some of his knights in training say it is almost like he is made of stone. That is because fighting evil is no joke. Not with Clay as your teacher anyway. His pre-fight punchlines are just horrible.[10]


Clay has always lived by simple rules. Be strong, valiant and true. Never let the enemy see your vulnerable side. Be hard as a rock against your adversaries. Well, now he has taken that last bit to a whole new level. The Forbidden Power that hit him has turned him completely to stone. And then the Cloud of Monstrux zapped him bad. Not good. If Clay was a great adversary in battle before, try fighting an indestructible, 10 times as heavy version of him. On top of all that Monstrux’ zap has awoken something in Clay and he is displaying mysterious powers and a lot of repressed anger. Could it have something to do with that mysterious witch Ruina Stoneheart? She has a certain hold on Clay.[citation needed]

Nexo Knights Handbook

"I am the only one who truly lives by the Knights' Code!"

To Clay, being a knight is serious business, so he takes training very, very seriously. He watches training films for fun, he has memories the entire Knights' Code, and he spends more time practicing his moves than sleeping. Clay loves to come up with stuff like training schedules and battle plans for the other knights.

That means Clay can be bossy, but he backs it up with solid fighting skills and nerves as strong as the metal in his sword. When you're in trouble and need a hero, Clay is the guy you want to show up.

Monsters don't scare Clay - but lazy teammates do. That's why he and Lance are constantly butting their helmeted heads!

The Book of Monsters

DEAR KING HALBERT, Clay is a true leader. Loyal, honourable, selfless and always puts his friends and his Knights' Code above everything else. I find him inspirational. He is solid and earthy-just like his name, Clay. He always encourages me, and even laughs at my jokes when they're not funny! What a great guy!

Character Encyclopedia

Rule Keeper

Clay's ambition is to be the best knight that he can possibly be. He expects his fellow fighters to be as hard-working and as dedicating as he is - and he tells them so, repeatedly.

The Book of Monstrox

Clay Moorington

Clay is the goodiest of the goody-goodies. What a Knight Scout! I've got some surprises in store for him. When I can get to him (getting to him is Evil Plan #57 in my Evil Plan Book) the other Knights will be putty in my hands. I know, I know - I don't have hands. There just aren't enough clichés for a cloud to use!

Try to Turn the Grey Knight

Ooooh, I think we're gonna have one of the Knights on OUR side for a change! I zapped a statue but what I didn't know was that this self-righteous Clay Moorington guy was hiding behind it. When I brought the statue to life - ZAP! - he got hit! And he started turning to stone! He's going to become 'the Grey Knight'. (Get it? GRA-NITE? Rock humour... I love it.) His body is like a rock and he'll be almost as evil as I am. Totally how I planned it. AHEM!


"When I'm not saving the Kingdom of Knighton from Jestro, the evil jester and his Book of Monsters... practicing in the academy gym, watching training videos or reading the Knight's Code over and over again... I like to join my fellow knights and turn on Cartoon Network... after all, I can scan NEXO Powers right off the screen!"[11]

Happy Graduation??

Top Student, Class President, Chivalry Captain, Prefect, Milk Monitor

Favorite weapon: Claymore Sword
Ambition: "To be worthy and heroic."
Most likely to: Stay late training.



Nexo Knights

Season 1: The Book of Monsters

Season 2: Books of Power

Season 3: Storm Over Knighton

Season 4: The End





Behind the scenes

  • His name is a play on the word "claymore", a double-handed Scottish sword.
  • A LEGO sculpture of Clay was presented at the London Toy Fair 2016.
  • His facial features are used as a generic template for civilians and other characters.


  • His favorite Nexo Power is Power of United Knights.[13]
  • When asked if Clay would have mastered his magic abilities in season 5, Giles Panton, Clay's voice actor, stated: "Lots of paths Clay could take. But he's very driven and I think he'd end up mastering those powers at some point. May not have finished that journey in season 5 though."[14]
    • This contradicts Tommy Andreasen's notes for Season 5, which showed Clay combining his power of magic with his swordsmanship.
  • His greatest fear is not being able to save somebody.[15] He is also afraid of snakes.[16]
  • According to Giles Panton, if Clay met Kalmaar from Ninjago, a great battle would ensue.[17]
    • Additionally, if he had framed the Nexo Knights for the murder of his father, "Knighton would certainly be in trouble."[18]
  • According to Mark Hoffmeier, Clay has a sly sense of humor.[19]
  • According to Tommy Andreasen, Clay and Macy's relationship is purely platonic.[20] They were never intended to be romantically involved.[21]


Main article: Clay Moorington/Gallery


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Nexo Knights: Merlok 2.0 · Clay Moorington · Lance Richmond · Aaron Fox · Macy Halbert · Axl · Robin Underwood
Allies: Ava Prentis · Jestro · King Halbert · Queen Halbert · Herb Herbertson · Alice Squires
Squirebots: Aaronbot · Axlbots · Chili Vanilla · Claybots · Cowbots · Éclair · Haute FancyPants · Kingbot · Lotta Fun · Lotta Budget · Macybot · Manuel · Persnickety Marge · Riccardo
Merry Mechs: Robot Hoodlum · Dennis · JohnBot
Knights' Academy: Beak · Brutzle · Captain Clash · Chef Munch · Ethan Zilgo · Fletcher Bowman · Griffiths · Izzy Richmond · Knightmares · Ottofae · Relik · Scapeland · Swordmore Brickland
Tighty Knighties: Jorah Tightwad · Shia LaBlade · Jousting Bieber · Brickney Spears · The Blok
Lava Monsters: Mayor Magmar · Beast Master · Lavaria · Whiparella · Moltor · Flama · Burnzie · Sparkks · Bookkeeper · Infernox · Ash Attackers · Crust Smashers · Flame Throwers
Stone Monsters: Monstrox · Stone Colossus · Ruina Stoneheart · Krakenskull · Garg · Roberto Arnoldi · Three Brothers (Roog · Reex · Rumble) · Harpies (Hilda · Ingrid · Ulrika) · Roguls · Gargoyles · Grimrocs · Stone Stompers · Stone Monster · White stone statue · Bedrock Monster
CyberBiters: Monstrox · Dragov · Ruina Stoneheart · Fred · Pola · Cezar · Berserker · MechaByter · MegaByter · VanByter No. 307 · VanByter No. 407 · CyberByters · InfectoByters
Forest Monsters: Mushlord · Baron Badwood · Dame Flora · Bramblina · Loggerhead · Deadwood & Knot · Elm of the Dark Realm
Sea Monsters: Behemoth of Brine · Marquis de Seaweed · Siren · Sharkerado · Mate Squiddybeard · Savage · Poop · Deck
Order of the Eight: Augustin Halbert · Reginald Brickland · Therence Richmond
Other: Aaron's father · Aaron's mother · Arthur Eaglewing · Axlina · Baron von Bludgeoneous · Cheddarton · Chopper · Coughmeyer · Cuthbert Richmond · Dustin Hoffmeier · Edvard Evanson · Gobbleton Rambley · Goldie Richmond · Hadda Hammerin · Jack Shields · Jebediah Hazard · Jestro cosplayer · Jestro cosplayer's grandmother · Jokes Knightly · Jurgen von Stroheim · Lance cosplayer · Mama Axl · Maynard · Mooper · Morty · Ned Knightly · Papa Axl · Princess · Robin's father · Roger the Scrubber · Roger van Nelsing · Royal Soldiers · Slab Rockowski · Trix Taylor · Woody Carverer