The protagonist is very powerful and has a bloodline similar to that of a ghoul. He was captured by the Celestial Dragons and became a synthetic product fused with a Devil Fruit. Long-term fighting and abuse resulted in a morbid personality with no sense of common sense and moral values. Mentally unstable, it is easy to lose control under the slightest stimulation. He kind of likes to kill, hates human beings, and is cruel to all humans except those he recognizes.
Due to writing needs, the timeline has been slightly altered.
Non-growth essay