The Faceless Potion emerges in the second volume as Klein Moretti's pivotal advancement elixir, a blackish-green brew whose multicolored bubbles burst into fleeting, random faces—an eerie manifestation of the potion's core principle of identity fluidity. Across the series, this potion marks the transition from Klein's early Beyonder stages to his mastery of disguise and persona manipulation, serving as both a literal and symbolic threshold into the Faceless Sequence. Its consumption catalyzes not only physical transformation but also the psychological dissolution of self, foreshadowing Klein's later struggles with identity and the blurring of his original humanity.

The Faceless Potion emerges in the second volume as Klein Moretti's pivotal advancement elixir, a blackish-green brew whose multicolored bubbles burst into fleeting, random faces—an eerie manifestation of the potion's core principle of identity fluidity. Across the series, this potion marks the transition from Klein's early Beyonder stages to his mastery of disguise and persona manipulation, serving as both a literal and symbolic threshold into the Faceless Sequence. Its consumption catalyzes not only physical transformation but also the psychological dissolution of self, foreshadowing Klein's later struggles with identity and the blurring of his original humanity.