Main Antagonist - Delta
Race: Elysian (Possessed by the primordial god of darkness)
Overlord of the seven nations, Delta is callous, self-serving and a deep-seated rage, which is split off and repressed, is at his core. He is unbending, and will manipulate others to serve his will.
As far as his crimes... I don't wish to give much away, so you all will have to read it and discover his malfeasance for yourselves when those chapters become available on Tapas