Being half-demon, my fursona does have a demonic side that shows itself now and then. Generally when she's angry. The wings become more pronounced, her eyes glow, and the colour of her fur changes.

Star brushes in background are from http://celestial-star.net/brushes
I used a reference for the torso, but I've lost the link to it. So if you recognise it, please let me know so that I can credit someone Cheers.