Traits: An excellent student at the Killer Academy. The eye patch on his head automatically displays his mood or thoughts (e.g., 'Anger' when he's mad). He is U-hee's younger brother. He is incredibly strong and has defined abs. He is highly intelligent. Even without weapons, he has learned Judo since childhood and can defeat opponents from beginner to intermediate levels barehanded. He has been childhood friends with Nang-sut since they were young. He trained intensely in China to master the Guandao and carries a 35kg one with ease. Gender: Male Age: 18 Main Weapons: (Mid-range: Guandao) (Long-range: Dual Uzis) Rank: SS+

Traits: An excellent student at the Killer Academy, mostly called Nang-sut by friends. She has a very foul mouth and swears a lot. She has pink hair and is the younger sister of Wi-heom, a second-year student. She has defined abs. At Wi-heom's suggestion, she is currently trying to learn Ninjutsu, but since she only recently started, she is still quite lacking. She has been childhood friends with Ugo since they were young. Gender: Female Age: 18 Main Weapons: (Close-range: Katana) (Mid-range: Kunai) (Long-range: Uzi) Rank: SS+

Traits: An excellent student at the Killer Academy with blue hair. While he is the biggest coward in the school and an otaku who loves anime and manga, he is a total professional in actual combat, fighting with the heart of a killer. He is Gu-pal-chil's older brother and a second-year student. He has defined abs. Since his father was in the special forces, he learned to use silver wire from a young age and handles it freely. Since silver wire has some difficulty in lethality, he compensated for this weakness by coating it with glass powder to cut through flesh. If he tightens the wire in earnest, flesh and bone fly off together. He is smart and utilizes the wire very effectively. He is incredibly strong and adapted to the dark. He has learned Jeet Kune Do and CQC to strike human vital points. He is kind to family and friends but prickly toward others. Gender: Male Age: 18 Main Weapons: (Long-range: Silver Wire) (Ultra-close-range: Knuckles) Rank: SSS-

Traits: An excellent student at the Killer Academy with white hair. He often serves as the group's 'punching bag' and gets teased a lot by his friends, mostly because he is so hyperactive and outgoing. He is Lee Ha-yeon's younger brother and a second-year student. He has defined abs. He is learning swordsmanship from Lee Ha-yeon and shows even more talent for it than she does. He possesses a wild instinct but doesn't use it often. He has never lost a fight. Gender: Male Age: 18 Main Weapons: Dual Katanas Rank: SS+

Traits: An excellent student at the Killer Academy. He has slight psychopathic tendencies and is overly energetic. He is Jang Ji-seon's younger brother. He has defined abs. He becomes very serious during sparring. He is proficient in all types of firearms. Gender: Male Age: 18 Main Weapons: All firearms Rank: SS

Traits: An excellent student at the Killer Academy. The eye patch on her head automatically displays her mood or thoughts (e.g., 'Happiness' when she's glad). She is U-go's older sister and is very energetic. She stays up until dawn every day researching poisons, leaving her perpetually lethargic. She has built up an immunity to poisons and has defined abs. She experiments with and uses poisons daily. Having received special training from an assassin, she is extremely fast and skilled in stealth and disguise. She has been childhood friends with Wi-heom since they were young. Gender: Female Age: 19 Main Weapons: Dual Poison-coated Kukris Rank: SSS+

Traits: An excellent student at the Killer Academy. She wears a small purple crown on her head and has a bit of 'eighth-grader syndrome' (chuunibyou). She is Nang-sut's older sister. She is arrogant and, like Nang-sut, has a foul mouth, swearing even more than her sister. Because she loves ninjas, she received special ninja training from a master in Japan long ago. However, since it didn't quite fit the 'killer' style, she uses a sniper rifle for long range. She refused to give up her kunai and dual katanas, and while switching between so many weapons could be cumbersome, she is the only one in the academy who handles close, mid, and long-range combat simultaneously. She has defined abs. As a ninja, she is extremely fast and adapted to the dark. She can use Ninjutsu like smoke screens or wall-running. She is also very smart. She has been childhood friends with U-hee since they were young. Gender: Female Age: 19 Main Weapons: (Long-range: Sniper Rifle) (Mid-range: Kunai) (Close-range: Dual Katanas) Rank: SSS+

Traits: An excellent student at the Killer Academy with blue hair. She is very shy, timid, and surprisingly clumsy. She is Pal-chil's younger sister. While she is usually shy and timid, she becomes cold and a battle maniac during actual sparring. She has slight abs. Having the same father as Pal-chil, she learned to use dual submachine guns from her special forces father since childhood. She is adapted to the dark due to night-shooting training. However, as the youngest, she is treated as the cute one by everyone. Gender: Female Age: 17 Main Weapons: (Long-range: Sniper Rifle) (Mid-range: Dual Submachine Guns) Rank: SSS-

Traits: An excellent student at the Killer Academy with white hair in twin tails. She is Lee Ha-yan's older sister. She has defined abs. She has studied swordsmanship since childhood and is exceptionally skilled at it. She is highly talented. She recently learned to use the rope dart (Seungpyo) as well and has already shown great talent with it. Gender: Female Age: 19 Main Weapons: (Close-range: Katana) (Long-range: Rope Dart) Rank: SS-

Traits: An excellent student at the Killer Academy. She is energetic and likes wearing revealing clothes. She is Hayate's older sister and has defined abs. Gender: Female Age: 19 Main Weapons: Machine Gun Rank: SS-