Nagumo's most notable traits are his laid-back attitude accompanied by his constant smile that seems impossible to wipe off his face. He also has an incredible talent for annoying those around him to the point of making them want him dead. Nagumo also shows to had pretty carefree, even in the middle of intense battles, once claiming to enjoy the wind in his hair as he stabbed a man in the arm. He is also very playful with his opponents, as demonstrated multiple times.