Kemumaki Kemuzou is a central character in the anime series 'Ninja Hattori-kun.' He is the primary rival of the protagonist, Hattori. As a ninja himself, Kemumaki often causes trouble for Hattori and his friends, using his ninja skills to create various challenges. Despite his mischievous nature, he is portrayed with a comedic flair, adding humor to the series. Kemumaki is known for his cunning tactics and is frequently accompanied by his loyal ninja cat, Kagechiyo. His character adds depth and excitement to the storyline, making him an integral part of the series.