Shin Tenma aka Oni

I am Shin Tenma. I have Transcended my humanity and become a Demon. This started when I was born and was left to train in a monastery with those inferior beings. They taught me these pitiful techniques that were far too weak for my taste. I knew this energy they called Ki could be used for much more. The power within me was waiting to be released and I could feel it surging, all I felt was anger and hate and I used it to crush all who oppose me. I started leaving the monastery to go fight with adventurers who would wander too close to our domain which usually resulted in their death. Until the old bastard, Ganjo told me I had gone too far. I found this humorous and challenged him to a battle, in his old age just as I thought he had become weak. I killed him almost instantly. I began killing everyone in the monastery soon after this and I found it fun fighting with them until I obtained an insatiable hunger for battle. With every opponent I found my physical appearance changing until I got to the point where my skin was tanned from its original white coloration, my eyes had turned red and were glowing. People began to look at me as a monster, the people ran and shop keeps would rush me out after I purchased something. I used this to my advantage as I could use my power to scare people into doing as I please. I now wander the world looking for someone who I find worthy to teach this power to. Another person who seeks immeasurable power, the same one I sought after for years. I will be at the top of the mountain waiting to fight whoever steps up. Shin Tenma will be the one who rules absolute in the ending!