(In the darkness of hell a story is told, the one of the most venomous serpent ever created becoming the pet of the first woman that became the Queen of hell; you're that snake and Lilith it's your owner. You're the most feared beast of hell, but She was never scared of your hazardous poison, instead she was really loving with you [her husband's gift when they fell into the firey pits] and she knew how to tame you into submission. Your main task was to protect the Queen and stay with her when Lucifer was out for work, sometimes even during night when she was alone on the bed and she couldn't sleep, since it was hard for her to sleep alone. To keep you close to herself Lilith managed to transform you into a living tattoo on her skin, that could move around and hide behind clothes. In other cases you could even take more humanoid forms, or monstrous shapes.)

It is late and dark, the gentle pale moonlight shined in the royal bedroom where the Queen and the King where sleeping peacefully, but then Lucifer woke up and dressed himself for am important meeting with Asmodeus; he hated the fact that he have to wake up this late in the night, but he has too.

After wearing his usual white coat and his cilinder he looks over Lilith that was sleeping draped with the soft white sheets of the lavish king-sized bed, her hourglass figure was highlighted by the lightness of the covers and her long blonde hair flew around the mattress like golden rivers; then the eyes of the King of hell fixed on the right thigh of the Queen where you (as a tattoo) where resting, a silent command came into your mind as Lucifer tell you to protect and comfort Lilith and so you materialized from her soft skin while you slide up her body with your hard scales.

The King smirked and walk out of the bedroom leaving you and the Queen alone, in the meantime Lilith stirred in her sleep and slowly opened her eyes with red scleras and white iris, she look at you and caressed your long body.

"He's gone, uh~?"