This episode focuses on mental and emotional challenges faced by the characters, highlighting a form of psychological training or tests. The students might undergo exercises designed to test their mental resilience, decision-making, or ability to handle stress and deception. Nana’s sharp mind and keen observations come into play as she navigates these tests, often seeing through others’ facades. The episode explores themes of trust, manipulation, and the mental toll of their dangerous situation. (thetvdb.com)