Rean's first question regarding the Divine Realm was what to expect once his group got there. Unfortunately, Rifindio only went out when he took missions to gain Divine Stones. Most of his life was spent in the Supreme Palace. Nonetheless, he told them what he knew.
The Divine Realm of this Universe wasn't much different from Lisan. However, according to his description, it was much, much bigger than the Realm of Gods. Rean wasn't really surprised by that since the Realm of Gods wasn't really a land. It was, in fact, the back of a ridiculously gigantic creature, Hyeoumu.
From what Rifindio explained, the Divine Realm was pretty much of the same size as the Heavens or Underworld. It was one of the three Higher Realms of the Universe, and it was the place most experts from the Mortal Realm ascended once they got a Divine Werdlem Stone.