maybe there is misunderstanding
but what i ment is more than 1 character share attack in the same time
but also check this
Grandia III also introduces aerial combos and finishes. When an enemy is cancelled, that enemy is flung high into the air. If another character manages to get in a combo attack while the enemy is still in the air, an aerial combo is initiated. These combos are more powerful than normal ones, and killing an enemy will result in an aerial finish. Aerial finishes can yield more gold or rare items