Sadly, no. You can only use Zack Fair.
Sephiroth's father is Hojo, a famous scientist who is in Final Fantasy 7 and Final Fantasy 7 Crisis Core, and his mother is Lucrecia Crescent, who worked with him on the Jenova project.
Genesis and Angeal having wings in Final Fantasy Crisis Core is never exactly explained. It is believed to be due to them being experiments of Project Jenova as they were born in a similar way to Sephiroth.
Final Fantasy 7, crisis core is a prequel
He is in Final fantasy VII, as well as the game Final Fantasy VII: Crisis Core. He also is a part of the movie Final Fantasy VII: Advent Children. Beyond this, he makes appearances in the Kingdom Hearts games as well.
No. Final Fantasy VII: Crisis Core is a single-player only game.
crisis is better
No, Crisis Core: Final Fantasy VII is a PSP-only title.
Final Fantasy VII is a lot bigger game than it's prequel Final Fantasy VII: Crisis Core.
Sadly, in Crisis Core you can only control Zack in the game. Crisis Core seems to break the Final Fantasy mold and unlike Final Fantasy VII, the game is completely centered around the main character.
Final Fantasy 7 crisis core is a prequel of final fantasy 7, it shows how cloud got to midgar and got the buster sword and many more,
Final Fantasy crisis core release dates: Japan: already out USA: 23 March 2008 Europe: To be Announced
PSP