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“I tried a lot of different things before I took up being bad. I tried being a wizard, but that blew up in my face. I tried being a Knight, but there's a lot of pointy stuff you have to be careful with. Everybody laughed when I was around.”
— Jestro in "Jestro the Bad... the Really, Really Bad"

Jestro is the royal jester of the King and Queen of Knighton. As a child, a Knight entered him the Knights' Academy to try and be a Knight, but he was not very good at it.

After leaving, Merlok took him under his wing and tried to help him get a job, and ultimately got him one as the King's jester. He was very proud of his job, though insecure.

After causing a power outage after messing up his act, he ran away in fear and met the Book of Monsters, who he would act with and become evil.


Main article: Jestro/History


Before his corruption, Jestro had white skin with red lipstick, a dark teal cape with bronze bells, and purple and sky blue striped clothing, including a jester hat.

After his corruption, Jestro remained white-skinned, but the sky blue on his clothing changed to red. Additionally, his bells changed to skulls, his clothing became tattered, and his eyes and teeth turned yellow. His now-twisted smile kept the same red lipstick he previously wore.

After being zapped by the Cloud of Monstrox, his clothing became even more ripped, and his skin turned blue, with lightning coursing through it. The sky blue on his original clothing became purple, while the purple on his original clothing became yellow, and his bells turned into lightning skulls. His eyes became yellow again, and his lipstick turned navy blue. His jester hat perked up whenever he was excited.

In the unproduced Season 5: TerrorBytes, he wears a blue and orange outfit with a golden belt and jester balls.


Jestro, feeling nervous

Jestro is, above all else, incredibly insecure. He's shown to frequently get stage fright, though he seems to be getting better, as he enjoys being on live television, and has little to no self esteem. His nerves often cause him to mess up his performances, and even before becoming a jester he failed at becoming both a knight and a wizard, leading him to feel he can't do anything right. Despite this, he still tries his best, even in the face of repeated failures.

He's also very emotional, and is easily upset. This, tied in with his tendency to make impulsive decisions without being properly aware of the situation, and the fact that he's not always the smartest gets him into bad situations, allows him to easily be manipulated. He's desperate to do something right for once, and be good at it, but sometimes puts that need above even his own morals, which was what caused him to go evil in the first place.

He has no problem going with whatever he's gotten himself into as long as he thinks he's doing relatively well, and falls for even the emptiest of praise without recognizing it's not genuine. He's also easily intimidated and scared, and Monstrox gladly takes advantage of all of this without Jestro being aware of it.

Jestro, though evil, smiling happily

However, despite willingly turning evil in the first two seasons, with little hesitation, he's not actually a bad guy, he'd much rather be on the side of good if he can. He cares a lot about his friends, especially Clay Moorington, and seems to show more reluctance to attacking them than things like becoming evil or attacking the general public.

He even starts to rethink attacking the castle as he heads there simply because, while it would be a great strategic move, the king used to be really nice to him, and he'd feel bad. When the situation arises, he's even willing to sacrifice himself for his friends.

Jestro's evil grin

While corrupted, his personality completely changes, especially as he starts to embrace being evil. He becomes more willing to attack anyone in his way, whether he used to have personal ties to them or not, and gains a lot more confidence in his actions. He also becomes less of a pushover, and more inclined to at least try to take charge.

Jestro re-electrocuted evil

Many of the evil books, after being found, further alter his personality, such as the Book of Greed making him more obsessed with finding and having gold than actually doing evil. The effects of these seem to be more temporary than the Book of Evil's original corruption effect, though, and rarely have an impact for longer than the episode they're featured in. Not all of the effects of the corruption disappear completely afterwards, either, as some of the confidence he gained and his willingness to stand up for himself remain.

After being struck by Monstrox's magic lightning, he acted more serious than before, and more evil. He would occasionally have moments of doubt before Monstrox zapped him once more. He also kept no sentimental connection to the Lava Monsters and criticized Monstrox for having one to them.

Weapons and abilities

Jestro isn't shown to have a lot of talents, and what few he does have he doesn't seem to recognize. Be that as it may, he's shown to be a great comedian, entertaining the knights and the entire town of Funnyton.

He hasn't been shown to wield any weapons normally, but both times when working with Monstrox, he's had a staff. He shows excellent use in these abilities of the Forbidden Powers. description

Jestro is not bad. He is just no good at being good. Or funny for that matter. He was King Halbert’s jester and every day people laughed at him. Except for when he actually tried to be funny, then they fell silent. One day Jestro had enough and he seized the opportunity to become so powerful that no-one would ever dare laugh at him again.[1]



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

  • The idea for Jestro was that he had to be as likable as the Nexo Knights and had to be quirky.[2]
  • Vincent Tong was told to put on a voice similar to Inigo Montaya in The Princess Bride.[2]
  • He was supposed to have a twin-sided head that switched heads whenever he switched personalities, but changed it because the idea was used for The LEGO Movie with Bad Cop.[2]
  • Tommy Andreasen intended to have Jestro sing.[3]
  • A life-sized LEGO sculpture of Jestro was present at the 2015 New York Comic Con.
  • A minifigure version of him in his normal outfit was not made.


  • He seems to have motion sickness during fast travel.[4][5]
  • He is the symbol for the Nexo Power Hail to the Jester.
  • Jestro is younger than Macy, and he had always wanted Macy to be his big sister.[6]
  • He can perform impressions of Merlok and the knights with varying degrees of accuracy.[7]
  • He seems to know a few Italian words.[8]
  • It is currently unknown what his hair is like underneath his hat, though he does have hair.[9] Vincent Tong, the voice actor of Jestro, guessed that his hair might be a slick back hairdo.
  • He has a natural yellow skin color.[10]
  • He is a great actor, despite Monstrox claiming that he's terrible at it.[11]
  • Jestro has always wanted to be a rock star, but he seems to lack a talent for singing.[12]


Main article: Jestro/Gallery


view · talk · edit Characters
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 · Ramsey · Robin's father · Roger the Scrubber · Roger van Nelsing · Royal Soldiers · Slab Rockowski · Trix Taylor · Woody Carverer