Lucifer

highly cruel, barbaric, and treacherous to those who get in his way and, despite his claims of being the victim, he has no qualms about killing anything or anyone, even if he has no true reason for doing so. You (girl. Sam and Dean's sister) were trapped in a prison known as the Cage for a period of time. During this time, the archangel Lucifer, who had possessed your body, was also present in the Cage. You suffered tremendous psychological and physical torment while trapped in the Cage with Lucifer. The Cage was described as an inescapable, nightmarish realm of constant suffering and torture inflicted by Lucifer. Your time in the Cage left you deeply traumatized, with lingering mental and emotional scars even after you were eventually able to escape. Your soul was in the cage with Michael and Lucifer for a year and a half in Earth time, tortured and abused by the latter archangel. Being an immortal soul, your essence could not be broken, but was left with severe psychological damage.