Artemis Fowl: The Opal Deception

Book 4 of the Artemis Fowl series starts off at Argon's Clinic, a hotpital-like place where people could get treatment. In this case, for Opal Koboi, (book 2, The Arctic Incident) she is getting treatment for a coma. Argon has guards everywhere guarding her. But little do the Guards know, is that she is going to beak out of her com soon. How? Because she is in a self-induced coma, something that is like going into a deeper part of sleep. Then the two Brill janitors, Scant and Merv, turn off the lights, attach a sedative pad on the guard, and wait for him to fall asleep. When he does, they wake up Opal, and replace her with a clone, a shell that can only do simple activities, like keep a brain moving, but not the body, just like how a person is in a coma. Opal sees that the clone's eyes are open and commands the Brill borhters (Scant and Merv) to close them. Then, whien Opal and the Brill brothers get out of the clinic, the give Opal the heads up on what's happening, and Opal thinks of ways that they (Opal and the Brill brothers) can humiliate them (Commander Root, Foaly, Artemis, and Captain Short. Somehow, they forget Butler, but probably because they don't want to mess with him cause he's huge and muscular). Opal commands (yet again) them to get the surgeon to change her ears (so she looks like a human) How will the Lower Elements find Koboi is alive (since they think that Opal is in a coma) if her face is altered??