Still want to keep it the magical creatures as the main thing, but I do enjoy the kind of airship idea. Maybe instead of peace, it's wartime. Humans vs. Creatures. Anael is just trying to keep a select few safe. Though I may make it something other than an airship. He has angel powers, he could just make another plane of existence (with an airship lol; actually maybe).
So, actually I really like the airship. How about: Wartime, Anael takes these people who don't wish to fight, saves them by blipping them out of reality into another plane of existence. This plane is basically just a mystical sea of some sort, with various floating islands and a single airship. The plane is uninhabited except for the crew, who were tasked with guarding said plane of existence. The group is then forced aboard the airship until it's safe to return. If it goes far enough, maybe they can even return to a war torn Earth.
Does that sound too unbelievable? Cuz I kinda like it.