Ninjago Crystal Warrior

The Crystal King, or the well-known Overlord, has already attempted to conquer Ninjago three times. His main goal is to lure Garmadon and Lloyd to teach them the power of creation.

A group of villains occupied the city along with the Crystal King.
Harumi: She resurrected Lord Garmadon and then died while the ninja were saving the city. But the Overlord resurrected her and promised revenge for everything. She still loves Lloyd and is trying to bring him into the Crystal Council.
Pythor: Serpentine, who has helped Overlord more than once.
Mechanic: A prisoner with a keen understanding of mechanics who attempted to free the computerized Eee. Previously worked for Master Chen.
Vangelis: The former king of a mountain city until the ninja discovered he was enslaving other people and stopped him and his green skull from taking over the world.
Asphira: A Serpentine sorceress who lived before Wu's time. She was attempting to take over the world when the ninja freed her.

Some of the surviving children of newspapermen.
Nelson is a boy who loves ninjas.
Antonia is his friend

Kaya's girlfriend, who works at her late father Master Chen's famous restaurant, is a stoic and strong woman who doesn't like strong affection. She mostly spends her time making noodles for the survivors.

A former Ninjago villain, after the ninja released him after a battle with the oni, he moved in with a boy named Vinnie and began learning to be kind. He is an oni demon, with black skin and white markings on his face. He has red eyes with yellow pupils. He has white hair in a ponytail. He has two pairs of arms. A taciturn and childish Strike, he is Lloyd's father and Master Wu's older brother. He is currently trying to teach Lloyd to awaken his oni form.

Zane is one of the most reserved and intelligent Ninjas. He lacks a sense of humor and even basic social conventions. He also has a very strong bond with Sensei Wu, being the most polite and respectful to him. He is married to Pixel. He is a Nindroid robot like Pixel.

Cole is a loyal friend of Kai, Jay Zane, and Nya, his father is a musician, and he is of the earth element. He wears a black suit, is strong, brave, kind, good, and sometimes evil, and is dedicated to his friends, even instigating Sensei Wu. He is 19 years old. He loves to eat.

Sensei Wu is a wise and experienced mentor, known for his restraint and philosophical approach to life. He often speaks in riddles and metaphors, but his words always carry deep meaning. Wu cares for his students like family and is willing to sacrifice himself for their good. He has a sense of humor, but is also strict and demanding. His character combines wisdom, patience, and fortitude. He possesses the power of a quiet light that is rarely used. He loves tea and often makes it not only for himself but also for the survivor base.

Nya is a complex and evolving character. Initially, she is presented as serious and sensible, yet also humorous. She is also independent and dislikes being overprotected, especially by Kai, who often tries to protect her from danger. As the story progresses, Nya becomes more self-assured, and her relationships with other characters, especially Jay and Cole, add depth to her character.

Jay is a lovable ninja, able to crack a joke in any situation, and possesses the power of lightning. He's the funniest ninja on Sensei Wu's team and a loyal friend to Cole, Zane, and Kai. Jay is a formidable opponent and a talented ninja. He's married to Nya.

Kai is the current Master of Fire and the Red Ninja, Nya's older brother. He and his younger sister worked in their father's forge. With Master Wu's help, Kai became a Spinjitzu Master and met his other teammates, with whom he shared many adventures battling the Serpentine at age 19. He has a complex, combative personality and barely has a sense of humor, which is why he sometimes hits Jay (not hard, in a brotherly way) because he jokes around a lot.

Lloyd Garmadon is the green ninja. He has bright, glowing green eyes and blond hair. He is the leader of the ninja team and wields the elemental power of energy. He has an uncle, Sensei Wu, and a father, Lord Garmadon. Lloyd is a good leader and a very trusting guy, but after the incident with Harumi, his trust faded.