Vaan - I had him using spears but I recently changed him to swords. He knows a couple white magic skills.

Balthier - I had him a spears too, then ranged with a gun, and now he has a sword/shield combo and some white magic.

Fran - I had her on bow, then I moved to sword, and now I'm back to Bow. She has a little more white magic than the previous two and she has a couple black magic.

Basch - Swords and healing...period.

Ashe - Swords/Shield and healing/defensive magic

Penelo - Rod/Staff and strictly offensive/defensive magic.