Abstract
In RPG, the main character may not speak spontaneously for the purpose of immersing the player. However, when a player selects from alternatives presented in the story, there is a problem that the player is separated from the main character if there are no appropriate alternatives. In this research, in addition to the alternatives, we implemented a function that allows players to freely input their thoughts. In this way, experiments were conducted to enhance the sense of unity between the player and the main character without breaking the story. Using the same scenario, we prepared two types of RPG, one with the function implemented and the other without. As a result of having 20 experiment cooperators play, it turned out that the RPG which implemented the function can be immersed in the main character. It can be said that this function has succeeded in increasing the sense of unity between the player and the main character.
