Kai has always been the strong one-the one who keeps moving, keeps fighting, keeps the fire burning no matter what. So when the mission goes wrong and the ground collapses beneath him, he doesn't panic. Not at first. Even when he's trapped under layers of stone, even when the light disappears and the air feels too still, Kai tells himself he's fine. He calls out, waits, tries to stay calm. Because that's what he's supposed to do. That's who he is. Strong. Steady. Unbreakable. The silence stretches. And little by little, something starts to crack. The darkness feels heavier. The space feels smaller. His voice doesn't sound as confident as it should. Thoughts he doesn't want creep in-what if they didn't hear him? What if they think he didn't make it? What if no one is coming back? But Kai pushes it down. Because he's not the one who falls apart. He's not the one who gets scared. By the time Cole finally finds him, breaking through the rubble and pulling him back into the light, Kai already has it buried. Gone. Hidden. Locked away where no one can see it.

After an accident that leads him to burn a teammate, Kai flees the monastery. Two old foes, seeking revenge, take advantage of the situation by brainwashing the fire ninja into helping them. -Takes place between The Island Mini series (or Master of the Mountain) and Seabound. (Cross-posted on Ao3)

🎉*Completed*🎊 Kai is known to be the master of fire. He is known as the red ninja and the hot head of the group. He has a sister name nya and he also see Lloyd as his little brother. What eveyone doesn't know is that he is secretly a demon from another world. Kai is the son of Redson and Mk before he was kidnap and thrown threw a portal. What would happen if they were to see each other again? Started: December 8, 2023 Ended: December 10, 2023 Sorry if there's any bad grammer or any spelling errors. Starting 2026 I don't give promission for any of my fanfics be used for youtube, streamings, etc. Found out someone took a fic without asking even though they did give me credit, I don't know how to feel.

(Inforno/greenflame) Kai and Lloyd have been happily dating since like a month after the overlord was defeated and they are happier than ever with Zane back. Lloyd is sad about loosing his father, but Kai's right there helping him through it. During a trip to the museum Lloyd encounters a very jealous spirit vowing to have what's his and that he better back off or else. Only problem Lloyd has no clue who that ghost was talking about. He goes back to the tea shop finding it blown to bits and the worst part? Kai's been kidnapped! (Warning past abusive relationship and rape do not read if you are under 18 you can read if you are over it torture scenes and very dark please do not read if you have a innocent mind cover image not mine)

Kai was once one of Ninjago's greatest heroes-fiery, fearless, and loyal. But over time, he began to see cracks in the foundation of everything he believed in. Master Wu's teachings, once seen as wise and balanced, started to feel like strict control. The ninja weren't being trained to think, to feel-they were being molded into obedient soldiers. When Kai voiced his doubts, demanding the truth, Master Wu didn't explain. He acted. Without warning or remorse, he pushed Kai off the mountain-the very place they had trained together for years. Bruised, betrayed, and alone, Kai hit the ground harder than ever before. But in the cold silence, another voice called to him. Lord Garmadon. He saw the fire still burning inside Kai-the anger, the pain, the potential. Garmadon offered what Wu never could: freedom, power, and a new path where Kai could forge his own destiny. Now, Kai is no longer the Fire Ninja the world remembers. He is something more-and something far more dangerous. As his flames grow darker, only one question remains: Will Kai use his power to reshape Ninjago... or burn it to the ground?

When the ninja go on a mission to an unknown island Kai gets bitten by a dangerous and deadly snake, now the ninja must find a cure to save him as he is slowly going evil and being twisted in pain. Will they be able to save him, his soul, and Ninjago before the time is up? I do not own ninjago, but the idea for this story is mine.

!!Lavashipping!! What if the ninja hadn't seperated Kai from Lloyd/Morro when he was trying to help Lloyd gain control over his body again?

"They betray me...They let me fall down.. After all we been through together they left me in the dust to die... No!I won't let them escape from this. It's my time to shine bright! I will take my revenge,just you guys wait... " After a bad day,ninjas got a call and they need to go to an battle.However,they lose. Kai got badly hurt and pass out,and his belovable friends left him on the ground thinking he's death. Kai wakes up in pain no much after the battle is over,noticing that his team isn't there. He tried to look for help but people from that town weren't happy about ninjas losing and didn't plan on treating Kai very nicely... After a very unpleasant situation,Kai find his teammates,but when he found them they were smiling,joking,being happy without him. Kai thought that they planned on leaving him behind,and diceided not to show up to them. He felt betrayal,anger and sorrow getting over him. Next morning he tries to find a place to survive but instead founds a ghost of Chen and Clouse. They teamed up and go to Chen's Island where they planned to take over Ninjago once again... . . . . . This book might be shorter than others(like many others fanfictions in this comunity) qwq. . . . . . Please don't judge i'm not very good writter I will try my best I promise QuQ . . . . . . Most of the characters belong to "Lego Ninjago". . . . Cover of this book is mine. . . . . Hope you enjoy! ❤

⚠️READ BEFORE STARTING⚠️ ⚠️Lavashipping After season 4. Kai feel some emotions that still want him to hurt Lloyd for being green ninja. He manage to get them in control but when Morro arrived and posses Lloyd he feels them again.. much strong now. Almost like.. obsession. ________________ Kai manage to get Morro out of Lloyd. Morro posses Kai but he keeps fighting. Kai then burn himself a little and Morro let go of him. Kai and Lloyd run to the bounty and leave. Morro was weak so he just let them go but he saw Kai memory....

After Nyas death everyone comforts jay, they brush over Kai and his feelings.