This is a world with only her. No matter when you are a human or a sword spirit, there is only one person in her world. However, when you are a human, she does not know how to love, but when you are a sword spirit, she only understands what love is...
This is a difficult journey, but I am willing to risk my life just because it is you on the other side.
Then you should always be there, waiting for her to wake up your sleeping soul.