The Village with the Large Windmill - S1.E15

Ren finds her way to the windmill city, El Blanca, but the village windmill doesn't turn because a large wall is blocking the path of the wind. The large wall was built by a small gang of thugs. Ren is almost hit by an airplane piloted by Eugene, a boy who wishes to break the wall down. He apologizes and offers Ren a place to rest. Eugene succeeds in breaking the wall the next day. Coud catches up to Ren, and defeats the thugs as they are about to attack. Three Sting raid appear and take control of the thugs' bodies; Ren reacts with Coud, and together, they defeat them.