She is Kakeru's childhood friend and knows his true self.

Bless my soul, John, is it nothing to see a man moved to that extent and know one's self to be the cause!

I know my self even if your not an alcholic its a hard habit to kick.

And indeed he seemed so, although I'd not known his olden self.

They get to know each other's true self and live happily ever after.

For to know a person's name is not always to know the person's self.

She felt that hi his own peculiar way he was the only person who knew her real self, and understood her pain.

Suddenly he realized that for all he knew, his earlier, purely human self might even have lived here.

"This wasn't touchy-feeling stuff aimed at getting to know your inner self," said one official.

It allows one to fully know one's self, and to truly live.