Good and evil monitor

The Good and Evil Monitor (선악측정기, Seon-agcheugjeong-gi) is a device everyone gets when entering the Hidden Floor. It indicates a Regular's level of good and evil. The more good things a Regular does, like completing quests, the more the black color on the gauge disappears.[1] Fully eliminating the black part leads to the Fruit of Good and Evil being destroyed. On the other hand, doing evil things increases the black part and when it exceeds more than half of the gauge, a Sworn Enemy starts their pursuit.[2]

Notes and Trivia

  • Good and Evil Monitor can be used for distant communications.[3]


  1. Vol.2 Ch.268: ??F - Hell Train: The Hidden Floor (5)
  2. Vol.2 Ch.266: ??F - Hell Train: The Hidden Floor (3)
  3. Vol.2 Ch.290: ??F - Hell Train: Training (3)



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