Yeah not to mention that in an actual fight, Mamoru does use her clone precisely to confuse her enemies about which one is the real her. They're straight up Shadow Clones but without the ability to use individual Jutsu. This would be more notable if/when she uses them for a fight and then you'd only have context clues to rely on if the Mamoru you're fighting is the real her or a copy based off whatever can be suss out from the text, and by extension what her opponent can deduce.