Wild Arms: the 4th Detonator

Jude Maverick has grown up in an isolated town called Ciel, which is completely enclosed in a large sphere floating thousands of feet above the surface of Filgaia. His sheltered world changes forever when he sees the sky "tear" and ships enter his homeland. Upon inspecting the campsite set up by the intruders, he sees something else that he has never seen before: a girl. The girl's name is Yulie and she is being held captive by the intruders after being captured by a "Drifter" for hire, Arnaud ...