It's Neir, Your second in command.

You rise to your feet.

You approach the door, eying it with suspicion. You brace yourself against the door, just in case.
"Who is it?" You say, fear creeping into your voice.
"It's me, my lord. It's Neir."
The deep baritone of your right hand fills you with relief. Thank the nine that it was him.
"Oh, good... Come in." You say.

You release the door and Neir steps inside.
Neir is a demon of great respect and the finest second that you have ever had. He was first assigned to serve you in the Civil War some years back and you have never thought ill of him. He is loyal, brave, and skilled in every discipline that you know of. And he isn't that bad to look at, either.
"You look well, my lord. Or, should I say, my lady?" He says, shutting the door behind him.
You lift up some strands of hair, unused to their presence. "Yes, I suppose you should say such."
"I must apologize for leaving you with Dran today, my lady. My duties ran longer than I had hoped."
"No need, Neir. I managed to deal with Dran just fine on my own. How did your mission go, then?"
"Perfect, sir. Twenty mortal vessels lie in the barracks, empty and ready for our forward push."
"Good. And have you picked out one for yourself?"
"I did not. I thought that you would want to do that your self."
You can't help but chuckle to yourself. "You thought correctly."
"But, that is work for tomorrow. I am... exhausted. Mortals have much less stamina than I am used to. Something to keep in mind."
You pull at the curtain separating the two rooms.
"Come."

Neir follows you into the bathroom.
You wave a hand and the candles placed around the room light up.
"Is there something I could do for you, My lady?"
"Yes, could you draw me a bath?" You say behind you whilst looking at your new body in the mirror.
"Certainly." He says and gets to work.
You never thought of mortals as beautiful but upon seeing your reflection, you are starting to rethink that. This girl is really quite something. Her long flowing hair, her fair features, all awaken something in you. You bring up your arm and give it a flex. Her muscle is a bit more defined than you would expect from a mortal woman.
You also lift up your breasts, each of them filling your hands perfectly. You drop them and watch them jiggle around.
"Neir, be honest, how do I look?" You say, not taking your eyes of your reflection.
"My lord?" He says.
You twist your body so you can see your behind. "This body. This... thing! Is it... Beautiful?"
He comes up behind you and places his hands on your shoulders. He is not that much taller than you are now. As he presses up against you, you can feel the hanging weight of his flaccid cock press against your rump.
"My lord, I think you look spectacular. I have always thought this, no matter who's form you take."
"Is that so?"
"It is."