Like "African Sunrise," this is "excerpted from The Great Book," which--if/when it becomes real--may be a pretty nifty book, indeed.
Phoenix is a created being, kept or trapped on Tower 7. Her body overheats and she gets shot at, but her body heals itself. She has a friend, Mmuo, who can walk through walls and cannot be held in the building, but he sticks around, anyway. Mmuo has a trick of direct communication as well.
Why she's created and what she is, you may surmise; it's a cool premise, nonetheless. Some description isn't stellar (the conceit here is that this is orally told, explaining the description), but it's a fun read.