Ao Fukai

The series' hero. The 13-year-old biological son of Renton Thurston and Eureka, technically making him Ao Thurston; he resembles his father during his younger days, but with the hair, eye, and skin color of his mother. His mother one day fell from a clear sky into a bay in Iwato Jima, before giving birth to Ao sometime later. After Eureka was handed over to the American Armed Forces ten years ago, as the islanders believe her and Ao's presence angered their local deity the "Sea Colossus" with the appearance of Scub…