I'm guessing if anyone had good enough senses to tell which one was the real him, they could just one-shot him when he was tiny.
Or, someone like Killua, watching him from afar and then waiting for him to break into pieces and send all his pieces away like he did earlier in this episode.
I'm guessing she's afraid that if Gon and Pouf start fighting in the room, Komugi could get hit in the crossfire.
Now I'm worried cause if they do all go back downstairs, Ikalgo will have to deal with them. Of course, I had thought that taking that taking her out was originally Ikalgo's objective, since an ant with the power to remove other people's Nen powers from people could screw up a bunch of their plans.
Oh Palm? That makes sense I guess.