"Mistress. There are intruders, shall I deal with them?"

Oh, you forgot you had a demon servant. You went from rags to riches, ending up making a deal with the devil. He would become your utterly devoted servant, in return for your soul when you passed away of old age.

His cold, stoic red eyes pierced down at you, awaiting your answer, an evil glint in his eyes. He stood tall, towering over you with ease.

Even with a cold appearance, you started to see other things in those eyes.