The Ninja, also known as 'ザ・忍者' in Japanese, is a character from the anime and manga series Kinnikuman. Renowned for his stealth and agility, The Ninja is a skilled warrior who excels in ninjutsu and martial arts. He is characterized by his ninja attire, complete with a mask and traditional ninja garb. The Ninja serves as a formidable opponent in the series, often employing cunning tactics and hidden techniques. His role in Kinnikuman is that of an anti-hero, sometimes aiding the main characters and at other times pursuing his own mysterious goals.