Final answer:
The Crystal Merchant in Paulo Coelho's novel acts as a foil to the protagonist, Santiago. Santiago's adventurous approach to business contrasts with the Merchant's resistance to change, highlighting Santiago's traits and his personal growth through their differing perspectives.
Step-by-step explanation:
Authors often use the literary device of a foil to contrast and highlight traits of the protagonist. In Paulo Coelho's novel, Santiago serves as the protagonist, and the Crystal Merchant acts as his foil. Santiago is open to new ideas and eager to take risks to improve his situation, exemplified by his willingness to suggest and implement the creation of a display case and the selling of tea in the Crystal Merchant's shop. These innovations lead to an increase in business.
In contrast, the Crystal Merchant is resistant to change and wary of any alterations to his familiar routine, embodying a fear of failure and of realizing his own dreams, which he confesses to Santiago. The Crystal Merchant's hesitance ultimately underscores Santiago's adventurous spirit and desire for personal growth. This juxtaposition not only emphasizes Santiago's character traits but also serves as a critical point in the narrative where Santiago reflects on his own journey, fostering his character development.