How do you play the major arcana cards if you don't want to add the character to your circle as a confidant?
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To my understanding, you don't. Major Arcana serve as confidants only, but the book does state that "not every character you introduce to your story needs to be a confidant, and not every confidant has to have a memorable impact on your story", so you could put the confidant prompts of confidants you're not interested in as more background events lightly touched on, or simply ignore the card and redraw.