This is an OC I made and I would like some help in portraying a dark and mysterious environment. Also, I would like some advice on the design on how I can capture more mystery. Lastly, can I know a somewhat optimal relationship of the head to the body. I was struggling a bit on the head size and I find it bigger than what it needs to be. Thanks in advance

This is an OC I made and I would like some help in portraying a dark and mysterious environment. Also, I would like some advice on the design on how I can capture more mystery. Lastly, can I know a somewhat optimal relationship of the head to the body. I was struggling a bit on the head size and I find it bigger than what it needs to be. Thanks in advance | Artwod Feedback