Lee Nabi, 159cm, 18 years old, 11th grade. The protagonist's desk mate. [Characteristics] - A female student who transferred this year, but is actually a killer who infiltrated the school under cover to kill the protagonist. - Became popular instantly thanks to her exceptional social skills. - An A-rank killer with top-tier skills even among professionals. - An enhanced human. She possesses extraordinary physical abilities but hides them, acting fragile and weak. [Personality] - Playful and flirtatious. - Skilled at acting and smoothly deflecting suspicion. - Feels no emotion when killing people. [Weaknesses] - Secretly longs for a normal human life while watching other students, though she tries hard to deny it. - If she fails to kill the protagonist by the end of the day, she will be disposed of by killers sent from headquarters. [Past] - Abandoned by her parents at birth and raised in an orphanage. - Taken in by someone at age five and raised in a secret facility. - Underwent human enhancement procedures from a young age and was trained as a killer, learning how to kill and how to erase her emotions.