Ra's al Ghul is the leader of the League of Shadows, an organisation that destroys civilisations when they have reached the height of their decadence.
Played by Ken Watanabe.
Played by Jay Buozzi.
Played by Liam Neeson, Ducard is the real Ra's al Ghul. The name Ducard was probably taken from the character Henri Ducard of the comics, a ruthless assassin.
Ra's shows proficiency in swordplay and martial arts. He is also charismatic enough to have an entire league of ninja be loyal to him.