Sayori

Sayori is the Vice President of the literature club at her school and one of Kuroninja’s friends. She helped Kuroninja defeat Lord Drakkon by giving positive motivation during Kuroninja’s training.

History
Sayori was the third person from the Doki Doki universe to enter the Kuroninja Multiverse, because Kuroninja’s Earth-0 counterpart didn’t want to leave her hanging. She spent some time in the void, but then left to help train Kuroninja against Lord Drakkon.

Over time, Sayori began hanging out with Kuroninja a lot. She then got the Dragon Orb and gained the ability to transform into Dragonranger-, a Negative version of Dragonranger.

Joining the Kuroninja Dojo
Sayori joined the Kuroninja Dojo. She was killed by Akuroninja and sent to the Outer Universe of Utopia. She came back to life later and became the Green Dragon Warrior again, but then the White Dragon Warrior stole the Green Dragon Orb.

Trivia

 * Sayori is one of the few capable of defeating Kuroninja, despite the fact that her name is not Sora.
 * Sayori is considered by Kuroninja to be the most controversial addition to the Kuroninja Multiverse.
 * Sayori is the most powerful being in the entire Kuroninja Multiverse.
 * She can defeat both Lord Drakkon and Oma Zi-O combined.
 * She also has the strength to defeat 100 billion Kamen Rider Odins at once.
 * Sayori is one of the few who are immune to the effects of the Shadow Dimension.
 * There is an inside joke in Kuroninja's videos where he sarcastically asks that Sayori should appear in Super Critic Taisen. It is unknown where this came from, but there is the possibility that Sayori will appear in Super Critic Taisen 2.