He was originally a nine-tailed white fox hurt by love. He went through reincarnation but didn't know what it was like.
He chose to guard silently, and his heart went from vague to clear, always caring about one person.
He once missed a heart that loved him deeply. This time he just wanted to face his own heart.
He is of the same race as him. He is ignored by others but valued by others. He is willing to use his own life to repay the kindness of others.