Why Corpse Girl sleeps

“This is also why she sleeps. After watching them for a while, I can see a regular pattern where the nanites expend all their electrochemical energy and then become dormant until a sufficient gradient rebuilds. As they start to shut down she gets tired, and then when they start back up they reset themselves.”
“And she forgets the previous day,” said Stealth.”

Excerpt From Ex-Communication, pg 441
Peter Clines
https://books.apple.com/us/book/ex-communication/id635706546