Last Exile - Ginyoku no Fam

Fam and Jize are young pilots in the kingdom of Turan, known for their inventive ways and skill at flying vanships—vehicles powered by the rare metal Claudia. Turan is ruled by two sisters: the elder princess, Lilly, and her younger sister, Milia. Dio, a mysterious pilot who arrived in town several months ago, is as talented as Fam. When the neighboring Ades Republic declares war on Turan, Fam, Jize, the princesses, and Dio find their paths crossing, and they must work together to survive.