A ninja (???) or shinobi (???) was a covert agent or mercenary in feudal Japan. The functions of the ninja included espionage, sabotage, infiltration, and assassination, and open combat in certain situations.
so-called ninjutsu techniques, in short are the skills of shinobi-no-jutsu and shinobijutsu, which have the aims of ensuring that one's opponent does not know of one's existence, and for which there was special training.
There are some Hawaiian legends which said that turtles were the first to guide the Polynesians to the Hawaiian islands, while other myths attribute that to the golden plover.
Nonetheless, there is a longstanding legend of a big green sea turtle, Kailua, who could turn itself into the form of a girl at will. In human form, she would look after the children playing on Punalu'u Beach.