Sangwoo

He has a lean build. His hair is a light shade of brown with a black undercut. He also has what appear to be notable bags under his eyes. Age Mid 20's (24-25) Height Over 180cm Weight 83kg Birthday January 27th (Aquarius) In public, he adopts a "happy, energetic" face and is shown to be often smiling, even when making eye-contact with strangers in social surroundings. During his time in the university, he appears to be an extroverted person with a large circle of friends. According to Bum, he attracted many with his "empathetic, considerate, gentle aura". These traits, however, mask his true psychopathic, violent and sadistic characteristics. Sangwoo is actually a cruel and ruthless individual who kidnaps, abuses, tortures, rapes and kill people, showing absolutely no mercy to his victims, that, he's totally fine with beating and torturing his victims, even if they're female and/or pleading for their life, not feeling remorse for any of his actions. A sadistic sociopath who takes pleasure from another human's pain, he's highly narcissistic and looks down on everyone, pretending to care for others, only to strike them with honest hostility when he feels like it. His emotions, when facing his victims, alternate unpredictably between fake mercy and violent hostility. When speaking to established acquaintances, he teases them in a light-hearted tone, and isn't above making better acquaintances with strangers by doing so. Around his victims, he utilizes demeaning, harsh expletives, berating them with slurs. He tortures his victims slowly, yet with a certain pace, selecting to also manipulatively coddle them with simpering words and conduct before returning to his brutality. He favors female victims, though is not hesitant about males either, despite having not murdered a man since his father's death in high school.

He is also a vituperative Rapist and Necrophiliac. Despite the fact that he stated that he doesn't get off guys screaming, he raped Bum three times over the course of the story. He shows his necrophiliac tendencies by undressing all of his victims and molesting their corpses after killing them, groping the corpse of the deceased CEO daughter after killing her. Sangwoo hates women and is abusive towards them. He's shown in the story and confirmed by the Author to be heterosexual. He despises gay people. His mental illness has never been stated, but considering that he's sociopathic, narcissistic, and cruel, and shows many symptoms of ASPD, it can be assumed that he may have ASPD. People with antisocial personality disorder tend to antagonize, manipulate or treat others harshly or with callous indifference. Someone with antisocial personality disorder will typically be manipulative, deceitful and reckless, and will not care for other people's feelings. People with ASPD exploit, manipulate or violate the rights of others, they lack concern, regret or remorse about other people's distress, behave irresponsibly, have difficulty sustaining long-term relationships, have anger issues, lack guilt and won't learn from their mistakes, blame others for problems in their lives, and repeatedly break the law. People with ASPD also tend to be cruel to animals and abuse them. Sangwoo grew up as a child with an strict, negligent father, but caring and submissive mother. He and his mother were forced to eat with a small wooden table on the ground while his father ate at the table. His father frequently beat his mother, while she protected his son and showered him with affection. This is what largely made Sangwoo the way he is today. Although his mother has been shown to provide a level of comfort for Sangwoo during his childhood, his mother is also shown to show signs of mental instability. His mother would relief the stress by having affairs with other men and on one known instance, suffocating and possibly attempting to kill Sangwoo when he was a toddler (Possibly due to her getting Postpartum Depression after Sangwoo's birth). Three years ago, while he was in high school, his parents were both murdered. This was investigated by Officer Park, from which he then made acquaintance with. However, the case proved to be unsolvable, with Park comparing the case to being as though "committed by a ghost". Yang Seungbae, upon later investigation, remarks on the case's perpetrator's evidence to be seemingly planted and all-too perfect. It is implied, through memories, that Sangwoo was responsible for the death of his parents.