Why did namgoong minsoo
stop yona from stabbing franco the elder in the sauna?
It was a preservation of her innocence. Killing someone is a lot heavier than doing drugs in that regard. He wanted her to be ready for the world outside but not compromise her humanity in the process.
She wouldn't be ready for the world outside if she couldnt kill someone or do whatever it took to to protect herself which is what she was doing on the times she was trying to kill franco elder
Nam and her have very different perspectives with him as an older man and her as a train baby. He remember life pre-train and tries to groom her for escape and is unable to completely let go of his memories of what life outside is like. She grew up in a dehumanizing environment and is willing to try to kill a dude if she has to. They should balance each other out but instead cancel each other out and wind up killing fucking everyone.
At the end in front of wilfords door nam and curtis was talking when nam stopped midway through telling curtis what he saw when he was going through the greenhouse section when he stopped to look at something. What did i miss? What did nam stop to see?