LAST EXILE - GINYOKU NO FAM

Last Exile - Ginyoku no Fam summary:

Vanships are flying vehicles that float and fly with the use of a rare metal called Claudia. Fam and Jize are young female pilots in the kingdom of Turan who have made a name for themselves for their creativeness and excellent piloting. Turan is currently run by the two princesses, Lilly, the older of the two sisters, and Milia. Then there is Dio, a mysterious pilot who drifted into town several months ago who is just as talented of a pilot as Fam. When the neighboring Ades Republic declares war on Turan, the paths of these people cross and they have to work together if they want to survive.