Captain Castillo is an Archvillain of the mercenary group, the Sky Raiders. Based on the reports he sends to and receives from Colonel Duray, he seems to be the man in charge of the Sky Raiders operations in the Faultline area (he's certainly the most powerful Sky Raider in the zone), and he seems to be interested in the archaeologist Delilah Stein. His attempts to attract her attention fail miserably, and Doc Delilah seems to be quite tired of him. Heroes can face him in: