Nya

Nya is Kai's Sister and is Samurai X. Nya also is revealed to have a split heart between Jay and Cole

Nya as Samurai X
Main article: Samurai X

Samurai X is atfirst the unknown rival of the Ninja. "He" always captured the Serpentine threats before the Ninja could think to stop them.

Nya as Kai's Sister
Nya is a sweethearted and competitive girl. In the first episode, the Skulkin attack Ignacia, where they lived, Kai told her to stay back, but she refused. She wants to be involved.