TN: The shrine maiden's title in Japanese was 白蝶鳥 "Shirochouchou", which literally means "White Butterfly Bird". 白蝶 "Shirochou" is the Japanese name for the cabbage butterfly, while 白鳥 "Hakuchou" is the name for the swan. I mulled over what to translate it as for a long time since the literal translation is too unwieldy, but finally settled on an astrology reference. It loses a little nuance but isn't so mouthy to say, hopefully.