Natsuki

Natsuki is the last one out of 4 to arrive into the Kuroninja Multiverse. She has the power of the Void, all thanks to two villains from the Shadow Dimension, and also because of Anti-Kuroninja.

History
At first, Kuroninja’s Earth-0 Counterpart had no idea what to do with Natsuki, probably because he was too focused on Yuri or Monika. But then, Momoninger went missing, because Natsuki kidnapped her so that Kuroninja would be aware that she exists.

Later, Natsuki was convinced by Sayori to join Kuroninja's dojo, but Natsuki was so bad at ninjutsu, probably due to low stamina. Anti-Kuroninja then saved her, and then she got defeated by Ikustan. Natsuki then got captured by Lord Nemesis and almost died, so she decided to train under Anti-Kuroninja. This caused her to develop and break her character at the same time, gaining the power to turn into Voidninger.

After the Voidninger Arc, Natsuki didn't really do anything, probably because Antonio Vega is getting most of the attention.

Natsuki made an unexpected return in Super Kuroninja Taisen Forever as the protege of Anti-Kuroninja and the 0th member of Emerald Club, despite not being green.

Trivia

 * Out of everyone in the Kuroninja Multiverse, Natsuki is the least annoyed by Anti-Kuroninja.
 * Conversely, Anti-Kuroninja hates Natsuki the least out of all DDLC characters.
 * Natsuki only became Voidninger so that it wouldn't appear that she had the same personality as Antonio Vega.
 * Natsuki is the last of all 4 DDLC characters to appear in the Kuroninja Multiverse.
 * Due to Sayori having the ability to defeat Kuroninja, and Movie Critic fearing Yuri, there is the possibility that Natsuki can defeat Toku Nation.
 * Natsuki cannot win against Kuroninja.