kai (best ninja forever) is called the RED ninja, he also owns a smith with his sister in the beginning of the story, clearly he is a red state republican kulak, but later as he gets attacked and his sister gets kidnapped he is forced to train with sensei wu, a old (probably soviet) spinjitsu master, there kai learns there is more to the world then just his career as a smith, there is a beautiful moment in the story where his sister is safe, but the evil lord garmadon is still on lose, and he decides to risk his live to save the world, the red that first represented his right wing selfish republican side changed meaning, now he is a true selfless red communist, this is the main arc of our main character in season one, and i get tears in my eyes every time i rewatch this beautiful piece, its recommencement to watch the whole series if you have not yet, its truly a masterpiece, and this arc is just a small part of the communist message the creators put into it