Nagumo Nagumo is a highly skilled assassin and a member of the Order in the manga and anime series 'Sakamoto Days.' Known for his unpredictable behavior and playful personality, Nagumo often masks his lethal abilities behind a carefree demeanor. He possesses exceptional combat skills, including mastery of disguise and adaptability in battle. In the series, Nagumo serves as both an ally and an enigma, playing a significant role in advancing the story and challenging the protagonist, Sakamoto, with his formidable presence and unique philosophy.