Empress
You walk out on a cliff, where you find in the ground a mouth poking out. It speaks: "It is me, the empress of these lands!"
She was buried in the cliff down to her mouth so nobody would find her! You pull her out of the ground and soon what was just a mouth becomes a whole empress!
こう, ご
きさき
None
When you finish unburying the empress, the first thing she says to you is: "Please, you must hurry and take me to Emperor こういち."
It's only natural the empress would want to see her emperor. And right now, the emperor of these lands is Emperor こういち.