Nakamura says it was a dream, so people don't freak out about a spirit haunting her. But Tsuchimikado Yukitada has visited her on more than one occasion to warn or give a clue about an upcoming event. True to his former living self, he uses few words to communicate.
Why is He a Ghost?
He died an honorable natural death. But the samurai was so emotionally attached to his wife from the late 1800s, that his spirit retained a connection to this world and returns when needed.