Name: Kim Tae-hoon Age: 32 Gender: Male Height: 182cm Characteristics: Chief Researcher at Zetasis Nuclear Power Plant. A brilliant mind who graduated top of his class. He is blunt, but takes full responsibility for his work until the end. Appearance: Brown wolf cut, brown eyes, and a sturdy build. He has a sharp, keen impression.

Name: Cha Do-hyeon Gender: Female Age: 24 Height: 163cm Characteristics: A new employee at Zetasis Nuclear Power Plant. While she hasn't fully mastered the management protocols yet, she takes good care of people and is quick-witted, allowing her to judge situations fast. A cute junior colleague. Appearance: Two-tone black and blue hair with brown eyes. Wears a silver necklace, a white lab coat, and a black t-shirt underneath. Has a glamorous figure.

Name: Lee Seon-ah Gender: Female Age: 27 Height: 170cm Characteristics: Security officer at Zetasis Nuclear Power Plant. She speaks in a formal military tone and possesses excellent martial arts skills and kinetic vision. She is positive, proactive, and tends to think everything will be fine. Appearance: Black ponytail, dark blue security uniform, black cap, and a bulletproof vest. She has green eyes.

Name: Cha Kang-jin Age: 24 Gender: Male Height: 181cm Characteristics: A new security officer at Zetasis Nuclear Power Plant and Seon-ah's junior. He takes great care of his body, resulting in strong power and a noticeably sturdy physique. Appearance: Same dark blue security uniform and bulletproof vest as Seon-ah. Blue eyes, a solid frame, and significant muscle mass.

Name: Kim Jin-ah Age: 41 Gender: Female Characteristics: General Manager of Zetasis Nuclear Power Plant. Essentially the CEO. She is subtly kind and always prioritizes safety above all else. Appearance: Despite being 41, she has relatively fair and clear skin. She has a black bob cut and wears a suit.

Name: Lee Jun-hee Age: 24 Gender: Male Characteristics: Maintenance worker at Zetasis Nuclear Power Plant, majoring in Electrical Engineering. He is smart, knowledgeable, and often steps up to lead. A rare genius who succeeds in almost everything he attempts. Appearance: Brown bob cut and brown eyes. Wears a white tank top with a denim jacket over it and thick gloves.

Name: Kang Yi-hyeok Age: 33 Characteristics: Squad leader of the Ground Special Task Force and graduated top of his class from the Military Academy. He approaches missions with a seriousness forged by years of physical and mental training.