If they can figure out what the spell's meant to do, yes.

Thank you! In real life, of course, it probably wouldn't be this easy, but Harry has the twin advantages of his power and his connection to Kingsley as a friend. At the very least, Kingsley has to acknowledge that a good deal of what he's saying is the simple truth.

Harry will try to stay in control, but he may rebel against some of Draco's specific plans for him.