One of the things I love most about the Knives Out films is that each of their protagonists is fighting against the world's image of what they're supposed to be, rather than who they are.
Ransom's plot against Marta relies on the idea that she is slipshod, unreliable, dishonest, and just as parasitic toward Harlan as his family is -- in short, the racist, fascist stereotype of an immigrant. But in fact, Marta is superb at her job, more trustworthy and honest than anyone else in that house, and has a genuine friendship with Harlan. Like real immigrants to America, she is skilled, brave, hardworking, and generous almost to a fault, and it saves her life.
Miles' attempt to steal Andi's company relies on the public perception that a white man is smarter than a Black woman, and more likely to be a world-changing disruptor -- as well as on the grasping, mercurial behavior of Andi's supposed friends, and the bet that no one would value Andi's work and life above their own financial position. But in fact, not only was Andi infinitely smarter and bolder than Miles, she was loved infinitely more: even after her death, her life and memory was more important to Helen than the Mona Lisa. Helen's love and boldness brought Miles down, even if she couldn't bring Andi back.
And of course, Jefferson Wicks, Nat, and Martha all try to embroil Jud in their plots by either painting him as violent or trying to provoke him into actual violence, relying on the stereotype that men, especially poor men, are fundamentally violent people. But in fact, Jud is empathetic, gentle, and forgiving, and his desire to understand and forgive the people around him is what solves the mystery and at last brings peace to his parish.
That's what makes Benoit Blanc such a lovable figure. He sees these people for who they really are, and his steadfast belief in them helps them save themselves.
