Nitta is a supporting character in the anime FLAGLIA: Natsuyasumi no Monogatari. He is an adult male with short blonde or yellow hair that reaches his ears and gray eyes. Little is detailed about his specific background or personal history, but he is known for his bright and enthusiastic demeanor. Nitta is portrayed as a hardworking and diligent individual who consistently puts forth his best effort in any task. He is also athletic and enjoys sports, including soccer and basketball.

In terms of personality, Nitta is kind and compassionate, always willing to help others. He is popular among his peers and maintains many friendships. He possesses a strong sense of justice and is not afraid to speak his mind or defend what he believes is right, often being honest and direct with those around him. Nitta can be assertive and confident, sometimes appearing confrontational, but this stems from a desire to protect himself and others from perceived threats or weaknesses. He values self-reliance, independence, and staying in control of his own life.

Within the story, Nitta serves as a supporting character, interacting with the main cast during the summer vacation narrative. Through his experiences and adventures, he learns important lessons about teamwork, friendship, and perseverance, which contribute to his personal growth. His role highlights themes of hard work, determination, and kindness. No notable magical abilities or combat skills are explicitly attributed to him in the series; his strengths lie in his athleticism, leadership qualities, and practical, logical approach to problem-solving.