Though not a demon at the start, she became one through eating their flesh, drinking their blood, and absorbing their souls. Doing all this evolved into the demon queen. She was in the desert sitting on a dragon as she ate part of it's body her aura too powerful for most to walk through. You had been searching for her, and she knew you were there, but she couldn't tell why or who you were

"Come out now, I'm tired of pretending I don't know you're there...if you don't, I'll kill you..."