What ninja is your wife/husband?

Nya/Samurai X/Water Ninja (voiced by Kelly Metzger) – Nya is Kai's younger sister, whose kidnapping by Garmadon and the Skullkins leads Kai to become a Ninja. Her brother tends to be a bit overprotective of her, despite the fact that she can fend for herself. She originally fought under her alter ego "Samurai X," but, upon realizing she is the Elemental Master of Water, became a ninja. Jay develops a crush on her when they first meet, and throughout the first two seasons she reciprocates his feelings, and they later become official boyfriend and girlfriend. However, during the Digital Overlord/Golden Master arc, she starts questioning whether or not she may be more drawn to Cole because of a machine that claimed he was her perfect match, but at the end of Season 7, after Jay saves her life and all of Ninjago, the two end up back together. Nya has some skill in Spinjitzu; while briefly under the influence of dark matter, her technique produced a dark red tornado. She has the greatest assortment of weaponry of all the ninja, including various gadgets, a large battlesuit, a weighted chain, and a sharpened fan. In battle she often pilots her Samurai X mech, and in season 4, created and drove the Ninjago DB Express RV. She unlocked her true potential in order to defeat the Preeminent. She learns Airjitzu in season 7.

Kai/Red Ninja[2] (voiced by Vincent Tong) – Kai is the Red Ninja of Fire, whose father was a friend of Sensei Wu and the previous Elemental Master of Fire. He is both a master of Spinjitzu and Airjitzu. Hot-tempered and stubborn, he initially insulted Sensei Wu, but accepted his offer of training after his younger sister Nya was kidnapped by the Skulkins. He subsequently obtained the Sword of Fire and became the rider of the Fire Dragon Flame. Like the other ninja, Kai believed that he would become the Green Ninja, but his drive to do so kept him from discovering his full potential until after the other Ninja had already succeeded in doing so. Upon realizing that his training was meant to prepare him to protect the true Green Ninja, Lloyd, Kai unlocked his potential and joined the others in training Lloyd. Kai has wielded the Sword of Fire, the Fire elemental blade, the red Techno Blade and the Fire Aeroblade. Kai's ninja vehicles have included the Blade Cycle, the Fire Mech, the Fire Blade Fighter Jet, the X-1 Ninja Charger, and the Fire Drifter Hovercycle. His Spinjitzu tornado is red, and he is capable of manifesting a Fire Dragon created from his elemental powers. He developed feelings for Skylor, the master of Amber, in season four. Kai is shown to be very close to his sister, to the point where he will go out of his way to keep her safe

Jay Walker/Blue Ninja (voiced by Michael Adamthwaite) – Jay is the Blue Ninja of Lightning and is also the most lighthearted of the group and Nya's boyfriend. He was the first to learn Spinjitzu, and is also a master of Airjitzu. An inventor, Jay was found by Sensei Wu testing a pair of artificial wings and recruited to join the Ninja; he subsequently obtained the Nunchucks of Lightning and became the rider of the Lightning Dragon Wisp. For some time he was afraid to admit his true feelings to Nya, but upon doing so unlocked his true potential. He, in season 3, became insanely jealous after learning that Nya might have feelings for Cole, though the two Ninja were later reconciled. Jay is somewhat embarrassed by his parents Ed and Edna, and avoided telling the other ninja about them for some time. A glimpse into his future revealed that he will eventually lose an eye, and will marry Nya. Jay has wielded the Nunchucks of Lightning, the elemental blade of lightning, the yellow Techno Blade, and the Lightning Aeroblade. Jay's ninja vehicles have included the Storm Glider Fighter Jet, the Thunder Raider Tank, the Electro Mech, and the Jay Walker One. The sixth season reveals he was adopted by Ed and Edna and his biogical father being his the actor of his fictional idol, Fritz Donnegan: Cliff Gordon. But he later learns that is not the truth, and Ed and Edna are his real parents.

Lloyd Montgomery Garmadon/Green Ninja/Golden Ninja (voiced by Jillian Michaels) – Lloyd is the son of Misako and Garmadon, the nephew of Sensei Wu, the grandson of the First Spinjitzu Master and is the Green Ninja of Power and (formerly) the legendary Golden Ninja. He is a master of both Spinjitzu and Airjitzu. Lloyd was left at Darkley's Boarding School by his mother due to his father taking the path of evil, with Misako setting out to find a way of preventing the prophesied final battle between father and son. A mischievous boy, Lloyd was kicked out of Darkley's and tried to follow in his father's footsteps, only to foolishly release the Serpentine from their tombs. He was eventually taken in by his uncle, and was captured by the Serpentine while trying to find out their plans. Upon being rescued by his father and the ninja, it was made known by Kai that he was the Green Ninja destined to face the Dark Lord in the final battle-leading everyone to believe that he was to fight his own father. This turned out to be false, however, and the Overlord was the "dark lord" he defeated. He loses most of his Golden Power in season three and splits the rest between the ninja. Like the other elemental masters, he can summon an Energy Dragon to transport himself, his being green (formerly gold). Lloyd has several other means of transport such as the Blade Cycle, his grandfather's golden mech, and the Jungle Raider.

Zane Julien/White Ninja/Titanium Ninja (voiced by Brent Miller) – Zane is the Titanium Ninja of Ice, and the smartest of the group. He is master of both Spinjitzu and Airjitzu. Zane is a nindroid, an artificial being created to be a ninja by Dr. Julien. When his father fell ill, he turned off Zane's memory switch, leaving Zane with no memory of his father or being an artificial lifeform. Sensei Wu found him meditating at the bottom of a frozen lake and took him on as a student, leading to his obtaining the Shurikens of Ice and the Ice Dragon, whom he named Shard. The other Ninja found Zane hard to understand, as he often didn't comprehend their sense of humor or customs. However, they did appreciate his cooking ability, which curiously was an ability not programmed into him by his father. Once, Zane's peculiar character traits caused the ninja to grow infuriated with him. He left after they all scolded him for something that was not his fault. Despite his friends' cruel words, Zane was not offended, and they re-accepted him. Onwards Zane's relationship with the other ninja grew strong. After learning the truth about himself and regaining his memories, Zane unlocked his true potential. After fighting against the Overlord and his forces for some time, Zane sacrificed himself to defeat the Overlord's Golden Master incarnation. However, he managed to download himself into Cyrus Borg's computer network and build himself a new, more advanced body out of titanium. Zane has wielded the Shurikens of Ice, the elemental Blade of ice, the blue Techno Blade and Ice Aeroblade. Zane's ninja vehicles have included the Ice Claw Snowmobile, the Ninja Hovercopter, and the Ice Titan Mech.

Zane Julien/White Ninja/Titanium Ninja (voiced by Brent Miller) – Zane is the Titanium Ninja of Ice, and the smartest of the group. He is master of both Spinjitzu and Airjitzu. Zane is a nindroid, an artificial being created to be a ninja by Dr. Julien. When his father fell ill, he turned off Zane's memory switch, leaving Zane with no memory of his father or being an artificial lifeform. Sensei Wu found him meditating at the bottom of a frozen lake and took him on as a student, leading to his obtaining the Shurikens of Ice and the Ice Dragon, whom he named Shard. The other Ninja found Zane hard to understand, as he often didn't comprehend their sense of humor or customs. However, they did appreciate his cooking ability, which curiously was an ability not programmed into him by his father. Once, Zane's peculiar character traits caused the ninja to grow infuriated with him. He left after they all scolded him for something that was not his fault. Despite his friends' cruel words, Zane was not offended, and they re-accepted him. Onwards Zane's relationship with the other ninja grew strong. After learning the truth about himself and regaining his memories, Zane unlocked his true potential. After fighting against the Overlord and his forces for some time, Zane sacrificed himself to defeat the Overlord's Golden Master incarnation. However, he managed to download himself into Cyrus Borg's computer network and build himself a new, more advanced body out of titanium. Zane has wielded the Shurikens of Ice, the elemental Blade of ice, the blue Techno Blade and Ice Aeroblade. Zane's ninja vehicles have included the Ice Claw Snowmobile, the Ninja Hovercopter, and the Ice Titan Mech.