Kai   Kai (Shadow of Ronin)   Kai (The LEGO Ninjago Movie)    
"Movie magic!"

This article is about a subject that is canon to the storyline of the LEGO Cinematic Universe.

Affiliation Secret Ninja Force
Weapon of choice Katanas
Element Fire
First Appearance The LEGO Ninjago Movie
Status Alive
Voiced by Michael Peña

Kai is the Red Ninja, and one of the six Ninja trained by Master Wu in the 2017 movie, The LEGO Ninjago Movie. He is Nya's brother.



Kai looks fairly similar to his TV show counterpart, but the main difference is his attitude. He still has the his signature hair, just a bit more full. He has a new red ninja gi, that is somewhat similar to his old one, with a few improvements. His scar is on the other eye and he sports a bandage close to his hairline.


Kai's attitude is more serious, like Cole in the TV show. Much like his own TV show counterpart, Kai is possibly impulsive, enjoys fighting enemies, and is loyal and protective of those he cares about, especially his teammates. Unlike his TV counterpart (beside the alternate face on his figurine), he seems to be curious or perhaps more sassy than his TV counterpart.

Official Description

This ninja is fiercely loyal and protective when it comes to his friends, like Lloyd, and his sister, Nya. Outgoing and enthusiastic, he is often ready with a hug. He might lack patience with some of Master Wu’s instructions, like trying to produce a flame by rubbing two sticks together, but Kai really gets fired up when there are bad guys to fight.[1]

Weapons and Abilities

Kai wields a pair of Katanas in the trailers, but he may be skillful with other weapons, though these are his favorite weapons.

It's unknown if he and the other Ninja have Elemental Powers, but likely not since they use their vehicles and weapons for most of the fighting. As seen in the trailers, Kai's vehicle has weapons that are fire-based like the flamethrower in his mech.

Like the other Ninja, he is a master builder.



Video Games


  • His vehicle is a giant humanoid mech, which has a flamethrower weapon on its arm.
  • His main weapon is a pair of Katanas.
  • He has the deep gray armor, similar to that of his Skybound variant.
    • He is the only ninja that wears armor in their standard suit.


In The LEGO Ninjago Movie


Movie Characters

Secret Ninja Force

Master Wu · Lloyd Garmadon · Kai · Nya · Jay · Cole · Zane
Allies: Koko

The Shark Army

Lord Garmadon ·

Ninjago City Residents

Mother Doomsday ·

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