Cole

Kai (Fire Master): An impulsive and devoted leader. Before learning from Wu, he worked at his father's Four Weapons forge. He became a ninja to rescue his sister, Nya, who had been kidnapped by skeletons. His weapon is a sword.

Jay (Lightning Master): A witty, emotional, and resourceful ninja. He grew up in a junkyard with his adoptive parents, Ed and Edna. He's in love with Nya. His weapon is nunchucks.

Zane (Master of Ice): The wisest and calmest member of the team. It is later revealed that Zane is a Nindroid (robot) created by Dr. Julian to protect those who cannot defend themselves.
His weapon is shuriken.

Nya (Master of Water): Kai's younger sister. For a long time, she secretly assisted the team under the guise of Samurai X, as she lacked elemental powers, but later discovered her gift for manipulating water.

Lloyd (master of the life element (energy)) - green ninja

An old man with a long white beard who wears his Asian conical hat.

Master (Sensei) Wu is a wise ninja mentor and the youngest son of the universe's First Spinjitzu Master.
Wu combines the strict rules of a teacher, deep wisdom, kindness and a great sense of humor, often enjoying a good cup of tea.

Cole's mother, Lilly, died of illness when Cole was a child. Cole's father, Lou, is a talented artist, singer, and dancer.
Lou is the lead singer of the famous quartet "Royal Blacksmiths"
Lou married Lilly, who was secretly an Earth Elemental Master. They had a son, Cole, who inherited his mother's powers. Unfortunately, when Cole was still a child, Lilly became gravely ill and died.
Relationship with Cole: After his wife's death, Lou focused on raising his son, expressing his grief through art. Wanting Cole to follow in his footsteps, he sent him to the Marty Oppenheimer School of Performing Arts.
However, Cole didn't share his father's passion for dance. Two days later, he ran away from school, but continued to write letters to his father, pretending he was still a student. Around this time, Cole met Master Wu and became a ninja.

A tall, muscular guy with thick black hair. He is a master of the earth element. He is a kind person and loves to eat well; his favorite dish is chocolate cake.
Cole rarely tells anyone this, but he can sing and dance, and he really appreciates quality music. He is steadfast and reliable.