This study analyzed players’ decision-making process in Werewolf and the success factors of persuasion in a 5-player Werewolf. In Experiment 1, we focused on the villager player and analyzed the process of deciding who to vote for based on what other players say. We proposed a decision-making model in which logical and economic rationality are prioritized, and when they still cannot decide, “empathy” becomes the deciding factor. Experiment 2 focused on persuasion situations and examined how successful persuasion is. The results confirmed that persuasion using logical persuasion materials is successful. This supported the model’s validity in Experiment 1 that logical rationality is the overriding criterion for decision-making. However, we could not observe the success factors when both persuaders had logical material. Future research will investigate the aspects of successful persuasion more deeply through complex persuasion situations and games with more proficient players.