Might as well drop this here, since I dropped it in a certain other demon thread on /trash/
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Inspiration:
https://www.youtube.com/watch?v=Mn1bQ8aWqZ0Another quiet night alone.
Well, not truly alone. There's him, you suppose. You're alone with him. That's a good kind of alone, you think.
The sun lingers below the horizon, casting its farewell glow over the sky. You idly stare out the open window, out towards the open sea, out past the cliffs, watching the waves come in. You feel a small tap on your shoulder, and you turn. It's him. He's not in his true form, but you can still see that ethereal glow in his eyes, the sharper than usual teeth in his grin.
"Let's go for a walk!" he says, "It's perfect outside," You find it hard to argue with that.
Down the path the two of you stroll, a trail worn into the dirt by countless travelers coming to admire the sights, the summer breeze rustling your hair and tugging at your clothes. One arm wrapped around the waist of the other, the two of you quietly joking and swapping sappy words as you make your way down to the cliff's edge. Maybe any other day, you'd be weary of the height here, but with him, there's nothing to worry about. The two of you sit, falling silent for a time, letting your legs hang over the edge, listening to the distant roar of the waves, bidding welcome to the stars and the dusty splash of the Milky Way.
You feel a slight shift beside you, both physically and more viscerally, in the air and in your bones. He's shifted, those great onyx horns curling up, back, and then forward, those teeth now long, gleaming, and sharp as steel, his face elongated into a monstrous visage. His eyes meet yours, now bright hellish embers that cast a soft orange glow on your smaller form. A clawed hand draws you closer, and he nuzzles your head affectionately, his breath hot and faintly sulphuric, a low rumble rising in his chest that morphs into a soft, hummed tune.
That's just the way you like him.