She has a superpower that she is wholly unaware of at the beginning of her story: she does not need sleep. Which is to say, she can sleep and usually does when she feels tired -- but she can stay awake indefinitely with only minor effort, and will suffer no ill effects either physically or mentally thereby.

I invented Dee for the tenth_wonders game, which was sadly short-lived. Every so often I drop her into one of the sandbox comms.