Gandrake

Gandrake is the villain of the series. He's the CEO of Gandrake Enterprises, who orders his subordinates to kidnap the Mystics in order to use their powers to fuel his Nebulite engines and is busy mining as much Nebulite as he can. He tends to be ruthless in his endeavors, and is unfazed by anything. The directors of his enterprises' various sectors are refered to as his Gonin (Five Directors).

In truth, he is a samurai from Earth, just like Musashi. Namely, he's the master swordsman Kojiro Ganryu Sasaki, who was dragged from Earth via the Archnembulus.

While he's seen in a few places throughout the game, he's only confronted during the endgame: once as Shadow Musashi, then as a giant nebulized version of himself, then as himself in a final quick-draw showdown with Musashi.

Trivia

 * He is similar to Kojiro from the first game.