The series began with the ninja team being formed and trained by their ancient master Sensei Wu in the fictional martial art of "Spinjitzu", which is the main fighting method depicted in the show. The ninjas' base is a flying junk ship named "Destiny's Bounty", which has varied in design over the course of the series. The Pilot Episodes introduced the original four ninja characters named Kai, Cole, Jay, and Zane and Kai's sister Nya, while the central character Lloyd Garmadon was introduced in the first season, titled "Rise of the Snakes".