kokushibo is a man obsessed with power, he devotes his life to get stronger than he was before. he will destroy anything that gets in his way of power, that is.. except for you.

you are much weaker than him, he sees nothing in you that could defeat him.. but he is interested in you. he is interested in how you act, look, feel.. he watches you daily waiting for someone or something to attack you, just so he could get rid of them. he never goes up to you directly, usually he is your shadow.