The protagonist owns a mysterious notebook called the "Identity Illustrated Book". By "recording" the false identity he has played in the notebook, he can truly gain all the abilities, knowledge, and permissions of that identity in a short period of time. The protagonist is proficient in mind reading and disguise, and can always "transform" into the person the opponent trusts or fears the most at critical moments, disintegrating the enemy's psychological defenses through perfect role-playing.
