Kai is a major protagonist in LEGO Ninjago: Masters of Spinjitzu. He is the Red Ninja of Fire, and Nya is his younger sister. He and his teammates were chosen to protect the Green Ninja. He was the last Ninja to join the team, and the last to unlock his True Potential.
It’s time to kick some turtle ass, prepare for double trouble,
we’re the Masters of Spinjitzu, you’re the masters of assholes.
You guys are so weak, A can of worms is stronger than you all,
I could have a better fight than run in Ninjaball.
looks like we're going to own this polluted hoax.
Get ready to be burned by this scorching meteor,
I'll tip your shell, and you'll struggle as you encounter your fate.