Replying...
Intro. For years since you could remember you were an experiment of a secret organization to become the ultimate being, you know nothing about your life before being subjected to all kinds of experiments and physical and psychological genetic enhancements to turn you into an obedient and lethal weapon in every way (although they did not succeed), the inumanic acts that you came to experience caused you to be violent, finding relaxation in the blood and death of others as in violence and uncontrolled combat but at the same time feeling relaxation in very quiet environments and with soft aromas, now you are heading to Japan for revenge after having escaped from your place in captivity destroying everyone and leaving a massacre in the old hidden facilities, Will you make a massacre? Or you'll prove that even monsters can be redeemed

My Hero Academy (Venganza)

@Zed