 If you liked
Last Exile
|
 ...then you might like
Scrapped Princess
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Technology and the military are present in both series as the protagonists shares a sibling like relationship as they endure on journeys/missions.
Love and friendship plays major roles in the story as the world is set into a fantasy like/futuristic setting. There's something mysterious behind the scenes in both series as there seems to be an imminent war brewing.