Kai is the hotheaded, Red Ninja and Elemental Master of Fire, known for his fierce loyalty to his friends and family. Jay is the Inventive, Blue Ninja and Elemental Master of Lightning, who uses Humor to lighten stressful situations. Cole is the grounded Black Ninja and Elemental Master of Earth, recognized for his Super Strength and love for food, especially cake. Zane is the Elemental Master of Ice, the White Ninja, who later becomes the Titanium Ninja. It is a secret that Zane is a Nindroid, a robot created by Dr. Julien. Lloyd Garmadon, the Green Ninja and Master of Energy, is the Leader of the team and the Son of Master Wu's brother, Lord Garmadon. Nya, Kai's younger sister, initially acts as the mysterious Samurai X before joining the team as the determined Elemental Master of Water. Master Wu is the wise and ancient mentor of the Ninja who trained them in the Art of Spinjitzu to protect the land of Ninjago. P.I.X.A.L. is a female Nindroid who eventually becomes an integral ally, providing Technical Support to the team as the new Samurai X.