He's between 16 and 17 years old, has silver hair and uses a sword. The boy came to this world to be in a constant search for the so-called "Jenova", who he believes is the "mother" who'll save the planet by destroying it. His only goal is to obey Sephiroth and reunite those who have Jenova in their bloodstreams, like Cloud, and he'll do anything to achieve that goal. He's not a bad person, but is always guided by bad people. As a remnant of Sephiroth, Kadaj has great strength and power.