Katsumi Liqueur is a central character in the anime series Silent Möbius. She is a powerful and determined young woman who serves as a member of the Attacked Mystification Police Department (AMP), a special police force tasked with combating supernatural threats in a futuristic Tokyo. Katsumi possesses mystical abilities, including the use of a powerful sword known as 'Grospoliner.' Throughout the series, her character navigates complex relationships and personal challenges, growing from uncertain beginnings to become a formidable leader and key figure in the fight against malevolent forces threatening humanity.