Kaguya Nanbu

Kaguya is a princess in the world of Kagura Amahara, part of the Endless Frontier. On her eighteenth birthday, she decides to undergo a cultural coming-of-age journey across the worlds of the Frontier. Her first stop is Lost Herenica, where she ends up making her way onto the wrecked ship called Mai Tierra, and lucks into figuring out the password to one of the crew quarters on the ship, where she takes a nap, until she is discovered by Haken Browning and Aschen Brodel.

(Source: Wikia)