The protagonist and player character of Avalon Code. Yumil (ユミル Yumiru) or Tia (ティア Tia) has been assigned the task of recording everything around him/her in the Book of Prophecy, becoming its new Chosen One in title. As such, he/she becomes gifted with the ability to read ancient runes; see and interact with Metalize (Recipe) Tablets, ghosts, and the Book Spirits; use any armament or equiment produced from the Book; and change the makeup of anyone or anything recorded in the Book. At one point in the game, he/she is given the choice to align with one of four legendary Weapon Schools.