In the game, as in the anime, players spend time onboard flying ships and travelling between floating islands. They'll be chased by the Empire and able to summon powerful creatures to fight for them.
While it's an unofficial guide and a homebrew offering, I think The Comprehensive Guide to Collecting & Crafting is a convenient resource for any DM who finds themselves dealing with a player character all about crafting.
Elusis has always been a land of a discovery, even the first races on this world found traces of earlier influences. Progenitor beings that carved the earth and channeled the seas, who through their immense power gave rise to the natural order and in doing allowed for the new races to rise.
The B'Dooga have two Gentle Song abilities. They can sing the Melody of Sleep and the Melody of Healing.