Because he had challenged it in the pre-existence, Joshua knew that the being who left this particular huge and extraordinary Divine Dungeon Shroud was the god who ruled the skies, 'Gale'– an Avian individual who had a pair of huge wings.
Apart from that, the priests, devotees, and children of Gale were all Avian people with twin wings who could fly freely, a race that followed their god with optimism toward the future all the way, living in the skies and mountains of Mycroft. They loved towering and sharp buildings just like how elves cherished exquisite arts and poems. There was also no question that the existence of Avian people had been an important part of the Mycroft Continent in the Glorious Era.