Nope, not Cloud. But you're close!
Since it's been 24 hours soon, I'm gonna go all out with obvious hints!
Hint 1: His parents died after a "terrorist attack"
Hint 2: He is taken into "custody" by the main character.
Hint 3: He's from a movie that was made about what happened 2 years after a 90's JRPG.
Hint 4: He has a desease.