Metaphor ReFantazio places you in many conversations that are important for how the rest of your journey will go. Some of these conversations are with the main antagonist of the game, Louis. He will ask you various questions that you must answer correctly.
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Here are all of Louis' questions and their correct answers in Metaphor ReFantazio. While the answers to most of the questions don't have drastic consequences, some do, and answering them correctly will determine whether or not you get the true ending of the game.
He asks why I became a candidate… How should I respond?
Louis will ask you this question during your first meeting with him, which takes place on 6/26 after you gain access to the Gauntlet Runner and fight Captain Gideaux.