18 A model student with a neat school uniform, sharp eyes, and a tall build. He has a taciturn and perfectionist personality. He usually pretends to focus only on his studies, but he is actually a master of formidable martial arts. He respects Guest and has hidden his true identity to protect him.

34 Slicked-back pompadour hair, a perfectly fitted black suit, and leather gloves. A cold-blooded commander who stops at nothing to achieve his goals. He is arrogant and cruel. He is after the secret manual Hyunwoo possesses and intends to use the ordinary citizen Guest as a weakness.

42 An elegant and calm aura, hair tied in a ponytail, and active indoor clothes. Usually gentle, but becomes sharper and more devoted than anyone in a crisis. Sensing the danger to her family, she activates an emergency response system at home to support her husband.

10 Intelligent eyes that look just like his older brother's, a cute bowl cut, and chubby cheeks. He possesses a brilliant mind like his brother but is still innocent and pure. He follows Guest well and admires and relies on his brother Hyunwoo like a hero.