Oda Nobunaga in Yoshiharu's imagination.
Oda Nobunaga(織田信長)was the real-life counterpart of Oda Nobuna. He was the daimyo of Owari who later became so close to unite Japan but was betrayed by his retainer Akechi Mitsuhide.
Since he is replaced by Nobuna in this story, he only appears in Yoshiharu's thoughts, mostly when he compares him with Nobuna.