Come now, Alex is so boring. Why not something more grand and mystical, like Fyodor Mendelayef or Esteban Villalobos or Arturo Rosetti or Henry Byrd?
Order the skeleton to move around. Try to do so both verbally and by focusing on that feeling of indecision and making a decision. Watch how the thing we see above us responds to our commands and its movements.
Order it to speak. If it can speak, order it to tell us what's going on. It's a long shot, but it's worth a try.
You look at the skeleton and consider for a moment what you should command it to do. You decide to try something small and think about it putting its arms down -its been holding them up even after you've taken everything from it. The skel... Piecewise lowers...his you suppose. Piecewise lowers his arms in a reasonable fashion; they don't suddenly go limp or shoot down to his sides or anything. Hmm. You try again, this time with words, telling him to raise his arms. He responds similarly though he raises his arms above his head this time. After a few more tries it seems like mental commands are the most effective and least likely to be misinterpreted. As you do this you watch the...whatever it is above your head and how it reacts. When you command Piecewise there is a slight flicker along the thread that connects from your thumb to his heart but the sheet or plane or surface or whatever it is above the skeleton does't seem to react. However, as you do this something comes gliding in through the wall. Its traveling along the plane, dipping in and out, above and below it, seemingly swimming. It looks something like a fish or an eel or a ray or skate or a mixture of all of them. The sort of primordial thing that you could imagine gliding through the oceans somewhere near the birth of life. It pays you no mind, but circles the "Well" or divot in the plane made by the skeleton. It is as you are looking at this that you decide to look straight up and see that you too are creating a well in that cobweby plane.
The ghostly creature seems to lose interest in a few moments and swims off, passing through the far wall. You watch for a moment and then get back to business. You order piecewise to speak its...his name and it does so, though His voice is little more than a barely audible whisper that you could easily mistake for a gentle breeze. When you order him to tell you what is going on however, he only repeats the words. You try it in a dozen different ways, different phrases, but he either says nothing or just repeats. You suppose that he might not have a mind, might be nothing but an automaton.
You decide that, if anyone were to ask you your name, Alex is what you would tell them.