What is she talking about, Helianne doesn't even want to be Helga and the Crown Prince will know if she's gonna try and force Helianne to be Helga, seeing as she joined the Royal Knights.
And why are they not telling the plan about the wand to Helianne when they need something from her? The prince knows that Helianne is willing to do anything to bring back Helga right now, so why hide things from her?