Kai Smith, the hot-headed Fire Ninja of Ninjago: spiky brown hair, red ninja gi, and a cocky grin. Fierce, impulsive, and fiercely loyal to his sister Nya and his team. Wields fire and the Sword of Fire, later mastering his Elemental Power as a true master.

Lloyd Garmadon, the Green Ninja: blond hair, green gi, and a scarred brow from years of battle. Once a mischievous brat, he grew into a calm, selfless leader. Master of Energy, destined to defeat his father Garmadon, and later a wise mentor to the next generation.

Jay Walker, the Blue Ninja: freckled face, reddish-brown hair, blue gi, and a mouth that never stops. Anxious, chatty, and inventive, hiding real courage under nervous jokes. Master of Lightning, a gifted mechanic and tinkerer.

Nya Smith, the Water Ninja: dark hair, teal-and-blue ninja suit, and a determined stare. Once Kai's sharp-tongued sister and Samurai X, she grew into a calm, capable leader and inventor. Master of Water, she can control tides and storms.

Zane Julien, the White Ninja: silver-white hair, pale metallic features, white gi, and calm blue eyes. Logical, polite, and quietly warm — a nindroid who learned to feel. Master of Ice, with a falcon's bond and a knack for cooking, he's the team's steady, analytical heart.

Cole Brookstone, the Black Ninja: black hair, sturdy build, black gi, and a steady grin. Grounded, loyal, and stubbornly brave, with a fear of snakes and a love of cake and music. Master of Earth, strong enough to shake mountains, and later a quiet, dependable rock for the team.

.A.L., the Nindroid samurai: sleek silver-white plating, glowing green eyes, and a calm, precise voice. Analytical, gentle, and quietly devoted — she grew from Zane's AI assistant into a hero in her own right. A brilliant engineer and Samurai X, she's Zane's partner in both battle and life.

Master Wu: long white beard, straw hat, simple robes, and a walking staff he rarely needs. Ancient, patient, and maddeningly cryptic, hiding centuries of grief behind riddles and tea. Son of the First Spinjitzu Master, brother of Garmadon, Master of Creation and Spinjitzu, and the teacher who forged every generation of ninja.