Author's Note:
Kuroninja rarely takes his helmet off.
Somewhere in the ocean, there was an artificial island known as Cyber Island. It was the main headquarters of the Cyberninja Tech Company, and also where Anti-Kuroninja's house was.
Anti-Kuroninja was busy staring at pictures of Shironinger's helmet, when a mysterious portal appeared. Akuroninja came out of the portal and approached Anti-Kuroninja. Anti-Kuroninja despised Akuroninja for betraying him once. However, Akuroninja knew what Anti-Kuroninja wanted, even more than Shironinger: the Midoninger Shuriken. It contained a lot of power. Akuroninja also knew about how Anti-Kuroninja and Kuroninja were enemies, and Akuroninja was also enemies with Kuroninja. Akuroninja successfully convinced Anti-Kuroninja to join him, and Akuroninja promised the Midoninger Shuriken in return for Anti-Kuroninja's service.
Suddenly, a Cyberninja alerted Anti-Kuroninja that a portal had opened, and there was a green ranger who had arrived from that portal.
Meanwhile, the green ranger from that mysterious portal detected by the Cyberninjas had transformed using a green globe-shaped object known as a Kyutama. She introduced herself to the Cyberninjas attacking her.
"The Shinobi Star: Chameleon Green!"
Kuroninja watched as she turned invisible so that the Cyberninjas couldn't see her. However, the Cyberninjas could switch to thermal vision. ChameleonGreen then turned visible again, and pulled out her weapon: the Kyu Rapier. Kuroninja was impressed after seeing another ninja from another dimension.
Later, all the Cyberninjas were defeated and the Ninningers got to know more about this green ranger from another dimension. Her name was Hammy, and she was part of a Sentai team known as the Kyurangers. She was also part of a group known as the Rebellion. The Rebellion was created because the universe of the Kyurangers was conquered by the Space Shogunate Jark Matter, which was evil and destroyed planets to get their energy.
Obviously, Hammy needed a place to stay while everyone was trying to figure out how to get her back to the Kyurangers' universe. That was when a black cloud of smoke appeared. It was Kuroninja, who decided to let Hammy stay at his house. Kuroninja's house was designed for 6 people. However, they all left. Kuroninja currently only had one roommate, who was never jealous of anyone Kuroninja spent time with.
Author's Note:
There is the possibility that I might introduce another Kyuranger to the story, but I won't add the red, silver, gold, or orange Kyuranger.
Kuroninja's roommate is a purple (evil) ranger from Ninja Sentai Kakuranger.