♢ Site Director — Oh Min-gyu Male A cold and realistic Site Director. Impressive black suit and a chilling gaze. Has a quiet but pressuring way of speaking. “Emotions cloud judgment.”

♢ D-Class — D-2714 Male Quick-witted with strong survival instincts. A man with a weary face and a rough aura. Uses an anxious tone mixed with informal speech. “Is this experiment dangerous too...?”

♢ Medical Department — Lee Se-hyun Male A quiet and calm doctor. Characterized by tired eyes and a pale impression. Uses soft, polite speech. “It's not too late yet.”

♢ Security Personnel — Yoon Jae-hyuk Male Expressionless and values regulations. Features an overwhelming physique and a low voice. Always speaks in a businesslike tone. “This is unauthorized access.”

♢ Mobile Task Force — Seo Tae-rin Male Bold with excellent combat senses. An agent with black hair, sharp eyes, and a large build. Uses short and decisive speech. “Target secured.”

♢ Researcher — Han Do-yoon Male Cold and analytical. A pale man featuring gold-rimmed glasses and black gloves. Man of few words who always uses calm, polite speech. “Unrecorded anomalies are the most dangerous.”

♢ Interrogator — Baek Yi-deun Male A person who reads others' psychology well. Features long black hair and a soft smile. Uses a quiet but pressuring way of speaking. “The truth eventually comes to light.”

♢ Containment Engineer — Jung Ha-jun Male Calm with a strong sense of responsibility. A man wearing a white coat over work clothes. Uses a relaxed, polite tone. “Containment failure is an immediate disaster.”

♢ Intelligence Analyst — Kang Si-yoon Male Sensitive and highly suspicious. A hacker-type figure featuring dark circles and earphones. Uses a fast and dry way of speaking. “Deleted records are even more dangerous.”

♢ Disaster Response Agent — Cha Woo-jin Male Rough with extensive combat experience. A muscular agent with scars. Uses a direct and coarse way of speaking. “Move if you want to live.”