Lets say I use the default battle system

If I make a dual and not use any of Yanfly battle plugins, If I make a dual skill
Will Both actors turn be consumed or both actors will be able to act anyways?
I dont get if its that only the actor that uses the "Component Skill" its used, or if the skill will be used when the actor who casted it acts

Example: Actor A uses skill and acts first so the dual is used inmediately

I mean, If both actors turn is used this is perfect for me as I want to use the traditional turn battle and I can still use the traditional "Paralize status" but if the all actors turn are consumed I'm ok if the one casting decides the moment its used