The Higher Plot Being is a supervisor of the plot and story of the FAW series.
As a plot being, the in-story beings like characters cannot see the full form of a plot being. Additionally, it can change its avatar in the story at will. Usually, it appears as a man wearing typical scientist attire, most prominently a labcoat, although it claims that its favorite form is a ball of light with a suggestion of wise, grandfatherly eyes given to anyone who looks at it. This form is reminiscent of Advent. Both forms are arguably male, yet as a being the neutral pronoun shall be used for reference.
As the supervisor of the story, the Higher Plot Being has ultimate power, able to remold the in-story multiverse at will if its superiors demand so. It is however not allowed to interfere with the story itself much, leaving all challenges to the actual characters.