Norm is absolutely one of my favourite characters in the Fallout universe. The fact he loves his family and wants what's best for them being what drives him to look for the truth of what has happened to them and why is fantastic. The ultimate difference between him and Chet, too, is a great show of his character. It began with him choosing to help his sister find their father and ends with him coming to the same realisation as she has – their father was not the man he said he was and much of their life has been a lie. Watching him decide to take the hunt for the truth into his own hands, even when it could be the end of him, is incredibly compelling.
What makes Norm so enjoyable to watch, too, is just how human he is. All of the characters in the show are that way, which is part of what makes it great (yes, even the ghouls as they were at one time human). The distress he feels at seeing what happened to Vault 32 being swept under the rug, and the anger he feels towards Betty and the others for doing it seemingly out of a desire for control and power more than anything else is tangible. The fact it drives him to take the risk of sneaking into Vault 31 shows his bold and couregous side, and also that it's driven by not only his own curiosities but his desire for the truth. It’s a great parallel trait he shares with Lucy and, as she comes to find out, their mother. The anger he feels towards his father and also the desperation he feels to survive are a great contrast of his truth seeking and his baser humanity.
All things considered, Norm's competing feelings of a desire for truth, a desire for safety, curiosity, and a love for his family are what make him a great character. The fact he shares those traits with Lucy but expresses them in different ways creates a strong parallel narrative for their characters, and also does a great job showing the two sides of courage. The fact neither he or Lucy are impervious or shy away from moments of weakness and subsiming emotion latch onto the naivety from their upbringing and also their humanity. With them both now having to reckon with the truth about their father, a reunion between them will I'm sure be great and also remind them that not all of their family members are bad. Reckoning with the truth about their mother and Lucy's love for her being what compelled her to end her suffering before breaking down at the gravity of it is another layer of complexity to their family dynamics that both of them will need time to sit with. The contrasting feelings of how they knew their father versus what they've come to learn about him serve well to separate them from others like Chet; where he, their cousin, chooses to remain wilfully ignorant, they chose to put aside their fears and look for a truth they knew was out there.
Chet is a coward because he chooses to ignore the truth he has seen with his own eyes.
Lucy is brave because she is willing to go to any and all lengths to find her father and is then willing to end the suffering her mother is under because of him; she is openly emotional and driven by that and the love she feels for her family and is horrified and shattered by her father being a different man than the one she had always known.
Norm is brave because he is willing to do anything for his sister and father and, when faced with the choice to stay in blissful ignorance, because he chooses to seek out the truth even when it could hurt him; he, too, doesn't shy away from the pain the truth about his father causes him and, like Lucy, has to learn to live with the competing memories of their father and the reality of who and what he is.
Hank is a coward because, while he goes to the extremes to attempt to preserve himself and his family, he refuses to accept the fact his actions have consequences for the way his children (and, previously, their mother) had seen him and instead tries to force things to go back to the way they were before his children could learn of his ability to be selfish.
And Rose was brave because she loved her children so much that she would and did do everything for them, even when she had to put her love for their father aside and risk herself so that she and her children could have a chance to live in truth rather than lies. Her children share that with her, even though they didn't know it, just as much as they share her love, empathy, and desire for the truth even when living in wilful ignorance could have been easier.
Tl;dr – the entire MacLean family being driven by love for each other but expressing it in different ways that ultimately drive them apart is not only great at showcasing the different sides of courage and cowardice but showing the way Lucy and Norm are so similar and are driven by their love for their family just as much as their desire for the truth and that neither Lucy or Norm shy away from their emotional and impulsive reactions to it presents them as not only fully human but two sides of the same coin; they are both couregous even though they take two different paths to the truth.
