dante is back to kill all the demons
you can also fight with vergil in the special edition. arkhan is the father of lady he wants the power a sparda for himself but he can't control it and he turns in to a kind of blob. dante and vergil will stop him tougher after they destroyed him. vergil takes the force edge(the sword of sparda) and tougher with his yamato he attacks dante. this is your last boss fight. after you defeat vergil he stays in the demon world. we don't now if he is dead our not??