Planet Ladder Vol 3

From the Tokyopop edition

Orphaned in a war she can't remember, Kaguya is happy with her adopted family. But chaos returns when a mysterious boy tells her of her past as a princess from another world. With her guardian, Gold, she sets out on a journey from world to world to claim her birthright. Courted by some, hunted by others, Kaguya's destiny is feared by all for it is her fate to decide which worlds shall rule, and which shall die.

Source: Anime News Network Encyclopedia