Marek considered that. He really didn't have a whole lot to hide, honestly; his allegiance was to Melinda first, the Dark Lord second, and his parents, friends, and Felixa after that in some order that had yet to be determined and would probably fluctuate based on their relative danger. And of course, any loyalty to Felixa was mostly in the process of being determined. But that was not the point at hand.
"That seems like it's almost a combination - or a middle ground - between Legilimency and the Imperius Curse," he said. Which was the impression he had of Ella's talents, but it was helpful to hear Melinda describe it, too. "Maybe it would help to learn how to clear out other thoughts and emotions, to determine which have been planted there? But it'd be easiest if anyone could be prevented from getting in to plant them there in the first place."