What does Nya’s experience with the thorn tell us about her? What is a personality trait you could use to describe her based on her reaction?

When Nya steps on the thorn, she simply uses another thorn to remove it. From this action, we can infer that Nya takes the pain of her responsibilities in stride, and that she doesn't allow that pain to become an obstacle for what she needs to do. Nya knows that her task is intergral to her family's survival, she is determined and tenacious.