The heroine's name is Yue Xia Gu, also called Sayi. People who don't know her usually call her Yue Xia Gu. Those who are familiar with the main characters just call her Sayi.
The ice coffin was hidden in the underground chronological chamber, and the surface of the coffin was engraved with:
"D'ella morte, custode dell'eternita"
(On Her Death, Guardian of Eternity)
Purpose: Essay