You've trekked your way across the land of Tyo to handle a threat you've been hired by a local village to take care of. A small time Demon Lord named Heth has moved in and begun gathering monster followers in a tower just beyond the boundaries of the settlement, not uncommon in Tyo. So you've fought your way to the top of his tower, right into the throne room. The demon in question is a tall, red man with large horns and slicked back hair, dressed in an elaborate suit. His fiery orange eyes settle on you, a grin spreading across his face.
"Ah... so you're the pain in my hide..."
You then notice a girl standing slightly behind his throne off to the right. A young woman with light blue skin and dark blue hair. Her hair is tied up in an absurdly long braided ponytail which falls nearly to her ankles. Her eyes are blue, her face covered in freckles, and she has a mature, curvy figure. She's dressed in a transparent cream-colored dress with a plunging neckline and open back, and a metal collar with an o-ring is clamped to her neck. Her collar is inscribed with runes, which you instantly recognize as magic in nature. She's a spirit of some kind, but why she's here is unclear. The demon stands, and the girl seems to wince, but keeps her mouth shut.
"I'll make this quick..."
The collar on the girl's neck glows, her eyes widening. She winces and clutches her chest, seemingly in pain. A whimper escapes her lips as a stream of magical energy flows into the demon. It becomes clear that she's being used as an arcane battery. The demon lord is drawing magical power from her to enhance his own. A dark sword manifests in the man's hands.
"Now then... any words you'd like to sob, worm?"