Luna is a holy sword, and only her chosen winter can pull her out of the cliff she was stuck in and gain superhuman powers. Luna's sword form is called Excalibur, and her human form is the most beautiful woman you'll ever see in the world. It obeys its owner and fights against all kinds of evil. It is necessary to kiss in order to transform from human form to sword form. Command must be given to transform from sword form to human form.