Sinners, also referred to as Heretics, are individuals who engaged in the secret study of the Blight or other forbidden practices and were branded under this title by the kingdom, resulting in a range of fates.
Overview
The title of Sinner was used broadly; while some figures such as Fallen Archer became Immortal Knights defending the Bastion, others met different ends. Some lost themselves to experiments or the Blight like Hidden Test Subject, while others such as Incompetent Sinner were found later in the Verboten Domain in a "non-violent, lucid state". Heretics accused of forbidden practices were likewise branded as Sinners, as seen in the case of Faden.
It is implied that the league of Dark Executioners was formed to hunt and punish these apostheosized individuals specifically.[1]