So, at night, Mittens was always "head cat", curled up against my shoulder, and Random Numbers was always "feet cat", who would make a nest down between my ankles.
With Mittens gone, Rannie has apparently decided that it's high time she try out for the "head cat" job.
What she doesn't understand is that the two most important qualifications for the position are: 1) Stillness, and 2) Quiet.
It's easy to sleep with a soft, fluffy cat curled up next to your head, purring softly. Not so much so with a cat who is constantly singing to you under her breath, getting up to change positions every thirty seconds, and occasionally frantically licking your pillow, the wall, or you.