Vincent is a dark, mysterious person who may look evil at first, but don't be fooled, there's a good person person under his outside. Not much else can be said about him.
Vincent is a good fighter because he uses a gun, which makes him a long range fighter. He is a great backrow fighter whether you make him a physical or magical attacker. His Limit Breaks though, can be a little annoying. He transforms into a beast which you can't control and does his own special attacks. This can be good or bad, depending on what enemy you're versing. If you don't know the enemy's stats then you could wind up doing no damage or worse, heal him. His level 4 limit break, Chaos, can be obtained by visiting Lucrecia's cave for the second time during disc 3.{ See tips section on how to get to Lucrecia's cave}. You can do the same thing to get his Ultimate Weapon, Death Penalty, too.