The real reason why the Admiral is so shy about this is not because she has no pants on, but because the image doesnt show her 12-inch cannon thats hanging from there.
Admiral "Why are you practically naked!?""I'm of the habit to sleep in the nude. It's fine, isn't it?
I've got something on top, right?"Admiral "Put something on below!""Hey, you're always up early, aren't you"