Niwa Nagahide is a supporting character in the anime Nobunaga Concerto. He is a senior retainer of Oda Nobunaga and is described as a resident scholar within the Oda clan. With short black hair and black eyes, he is an adult male who serves as one of the four generals named by Saburou, the modern-day student who has taken Nobunaga's place. Nagahide is characterized by a calm and composed demeanor, rarely showing agitation even in tense situations. He is deeply loyal to Nobunaga and prioritizes his lord's safety above his own, often acting as a protector and trusted advisor. His intelligence and expertise in military tactics make him a valuable strategist, and he uses his cunning to help navigate the political and military challenges the Oda clan faces. He is principled and methodical, relying on established procedures and careful planning. Despite his serious exterior, Nagahide has a softer side; he cares for his family and shows an appreciation for music, particularly the concerto played by Saburou. His role in the story is to provide guidance and support to Saburou as he adjusts to leading the Oda clan, acting as a mentor figure. Nagahide's key relationships include his fellow generals Shibata Katsuie, Akechi Mitsuhide, and Hashiba Hideyoshi (formerly Tokichirou Kinoshita), with whom he works closely in campaigns. His development is subtle but visible as he comes to accept and trust Saburou's unorthodox leadership style, eventually aiding in Hideyoshi's rise after Nobunaga's death. Notable abilities include his strategic acumen, his role in administrative and political affairs, and his skill in combat as a veteran samurai.