Luvo is first mentioned in Will of the Empress, although the mention gave readers little details about his appearance or nature. He is a heart of a mountain that is located in Yanjing, though he decided to join Evvy in her journeys. The meeting may be written about in the unreleased book that focuses on the Yanjing war, however Melting Stones describes the matter in passing, and that Luvo's mountain still stands despite his being away from it. As of Melting Stones it had been two years since Luvo first came to the above-ground world.