Arthur

アーサー

Sky World (Raised)
Driver:

Spoiler

Because the opening of the "Divine Gate" had thrown the three worlds—the Sky World, the Common World, and the Demon World—into chaos, the "Knights of Round" were formed within the "World Council" to bring new order.
Although he currently resides in the Common World, he was cast into the Sky World as a child in the past.
He keeps a certain thought regarding the Divine Gate secret while gathering Adapters, such as Akane and the others.