Characters
Cloud Strife
Role in FFVII: Main Character [Playable]
Role in Movie: Main Character
Cloud makes a return as the main character in the movie. He is all alone in the world, wondering if they done the right thing in attempting to save the planet. He now sports a new look wearing a black outfit instead of the purple from FFVII. He carries his trademark buster sword.
Sephiroth
Role in FFVII: Main Character [Non-playable, enemy]
Role in Movie: Unknown
Although it is currently unknown as to what role Sephiroth will play in the movie, it is now likely that he will appear as more than just a flashback. We come to this conclusion as Square-Enix has listed him under the characters section of the official site.
Kadaj
Role in FFVII: Not in game
Role in Movie: Main character [Enemy], Leader of Silver Haired Men
One of the three Silver Haired Men [SHM]. He is in opposition to Cloud and appears to be the leader of the group. Nomura has said that the story will begin to revolve around the SHM. It has been noted that he bares a striking resemblance to Sephiroth. He uses a weapon which has been confirmed as being a refined double sword and has exceptional sword skills.
Loz
Role in FFVII: Not in game
Role in movie: Main Character (Enemy)
One of the three SHM, although the oldest of the group, he is a crybaby. His combat skills have been noted for his fight in the trailer with Cloud, and he has an extremely fast attack. He uses a weapon called "Dual Hound" which is both a shield and a gun.
Yazoo
Role in FFVII: Not in game
Role in movie: Main Character (Enemy)
Another of the SHM, however, as with all of them, little is known about what role he will play in the movie. His weapon appears to be a kind of gunblade, and is most likely the weapon confirmed to have the name "Velvet Nightmare".