- "Welcome to Grand Sensei Dareth's Mojo Dojo. I am Grand Sensei Dareth and I 'Dareth' you to join my dojo!"
- ―Dareth [src]
Dareth is a Ninjago minifigure and the boastful owner of "Grand Sensei Dareth's Mojo Dojo". He claims to know animal martial arts and to be the brown ninja. In episode 26, Kai dubbed him an "official" member of the Ninja team. He is often portrayed as a clumsy and goofy character, helping people due to luck. He first appeared in the Ninjago: Masters of Spinjitzu TV show, and later released as a minifigure in 5002144 Dareth vs. Nindroid and 70751 Temple of Airjitzu.
Dareth has smooth, glossy hair and a proud smile. He wears a light brown gi, that being the name for martial arts apparel. The left side of the gi is folded over the right, with the edges of the clothing lined with gold. He wears golden necklace with a star in the middle. His legs feature symmetrical dark brown and elaborate gold printing.
Dareth, or "Grand Sensei Dareth", bragged that he was the master of all "animal" fighting styles (the tiger, penguin, python, and dragon) He also claimed that he could call on the Ultra Dragon whenever he needed help. He was at one point asked by the ninja if they could use his dojo to train Lloyd Garmadon, the destined Green Ninja. Dareth agreed to let them if they were able to defeat him in a battle. Kai had Dareth flat on the ground within a second and they were then allowed to use his dojo. Sometime later, Dareth and the ninja witnessed Lloyd break twenty wooden planks along with the floor under them using an Earth Spinjitzu power. Dareth then claimed he could break fifty boards, having his students, Jeff and Phill, set them up, in an attempt to persuade the ninjas into letting him join the group as "The Brown Ninja". However, Dareth broke a total of zero boards and was laughed at by all the ninja as he clutched his arm. When Captain Soto and his pirate crew invaded Ninjago with The Black Bounty. Dareth attempted to attack the pirates as "The Brown Ninja," only to be tied up in ropes and forced to "walk the plank". When Dareth fell, he was rescued by Lloyd, who was riding the Ultra Dragon. He later asked the ninjas to forgive him for his boastful ways, admitting that he had had no training, that he had simply painted his belt and that his trophies were all fakes. In Ninjaball Run, his dojo was going to be demolished by a company called Darnagom Enterprises, which was used by Lord Garmadon attempting to stop the training of Lloyd, who would eventually defeat him if he were allowed to reach his true potential. To save the dojo, the ninja participated in the Ninjaball Run, a race that offered enough prize money to save the dojo. Dareth was able to make an emotional speech during the race to have the crowd cheer for the ninja.
In The Last Voyage, the ninjas put him in charge of the people of Ninjago and declared him as the brown ninja. When asked about his element, Nya replied: "Hot air?", leaving him thinking that he had the power of controlling the wind.
In The Ultimate Spinjitzu Master, Dareth was the only person left in Ninjago city who had not been turned evil by the Overlord and his Stone Army. When the Overlord morphed into his true form of a giant dragon, the Helmet of Shadows, that which controlled the Stone Army, fell off his head. Dareth found it and became the leader of the stone army. He commanded his new soldiers to help him attack the Overlord. After the Overlord's defeat, the ninja finally decided to make Dareth an official member of their team.
In The Surge, Darreth was seen watching a "ju-jutzu dog show" in Sensei Wu's Youth Academy, until the TV's power drained out. This explains that Darreth might be a teacher at Sensei Wu's Youth Academy.
In The Curse of the Golden Master he looks after the students because he's filling for the Ninjas and Sensei Wu. He takes them to the aquarium to see the electro-cobrai exhibit. Later while Pythor is releasing the electro-cobrai some sharks also get out and Dareth uses his "abilities" to save the students.
He returns in season four, with Nya reluctantly taking him along on her journey to Master Chen's island, where he provides some assistance to her due to his abilities as a "Master of Disguise expert." Unfortunately, he manages to get himself caught by Chen's forces, but is later freed and joins the Ninja in their efforts against the reborn Anacondrai tribe.
Dareth returns in season five in a few brief appearances. He appears as a blow-up doll when Nya turns on the autopilot on the Bounty. The doll is later popped during the fight with Morro. He makes a brief appearance a few episodes later. He is seen driving and flirting with a woman driving by. He later hits a cement mixer and get covered in cement due to Jay knocking an ink well onto his scroll in the Cloud Kingdom.
- His hair is the same as the Daredevil's, Mechanic's, "Where are my Pants?" Guy, and Frank Rock's, except in brown. However, his brown hair is physically made for Dr. Egon Spengler.
- His legs have the same design as the original Lion King's from Kingdoms, except also in brown.
- The Overlord, Misako, and Dareth are the only characters to have appeared in the TV series before becoming a minifigure.
- He is also the "master of disguise" as revealed in Spy for a Spy.
- He became a reason for ninja to make a Roto Jet in Tournament of Elements.
- He only appears in special sets, one being Toys-R-Us exclusive, and the other being a set in the Ultimate Collectors series.
- Ninjago: Masters of Spinjitzu