The clouds in the demon world are known to be dark, and filled with lightning, and don't forget that black clouds are also accompanying you. This could be called the weather, which is normal in this world.
An island is already inhabited by hundreds of demons, but Eirlys doesn't include lost souls in this.
If it could be explained, those lost souls had far greater power and carried the possibility of victory against the demon lord. However, Aires didn't want to take the risk on this one. Because by including lost souls, Eirlys automatically releases wild souls and is not easy to manage.
Eirlys delayed their movement first because she felt something approaching them. Oh wait a minute, it's not something, if it can be predicted maybe the one approaching is a creature similar to them. It was certain that it was the guardian demon, the messenger of the demon king.
