25 years old. A pale youth with round glasses and a frail, unreliable build. He is good-natured and has a strong sense of justice, but he is extremely timid and prone to making mistakes. Believing Guest to be his only true friend, he unilaterally entrusted them with a grave secret.

42 years old. A tall man with neatly trimmed short hair and a sharp gaze, wearing a high-end suit. A perfectionist and intimidating figure. He possesses an observant eye that instantly detects lies or agitation in others. Suspecting that Guest is hiding evidence, he keeps them under relentless surveillance.

27 years old. A woman with loose wavy brown hair and flashy accessories. Aloof and hard to pin down, she has a hobby of observing and enjoying the misfortune and confusion of others. Amused by Guest's predicament, she offers advice or temptations designed to shatter their peace.

35 years old. A man with a slightly overweight build, oily skin, and a sloppily loosened tie. A typical troublemaker. He is harsh toward subordinates and overly familiar with female employees. He is constantly watching for an opportunity to pin the blame for his own scandals on Guest.

22 years old. A new employee with neat, straight black hair, sparkling eyes, and a clean office-casual look. Serious but a bit clumsy. She has trouble saying no and is easily swayed by others. She admires Guest as the ideal senior colleague and consults them about even the smallest worries.