If we talk about "Sin" We will think of what follows which is the law of karma. According to the beliefs of many religions, those who have sinned If they die, they must go to hell. and be tortured until the sins that have been committed are fully paid for
This belief made me imagine A "gatekeeper" to the land that no one wants to enter
She is the representative of the two worlds, Hell and Heaven, her duty is to decide the way and to open the door to those who come. It's believed that she would exchange souls with those who entered and would give a ring and golden key to symbolize that the person had passed through the soul exchange and was able to travel inside. If anyone resists She would then devour the soul to make her body intact and never grow old or "IMMORTAL"