Luna is the daughter of the famous Admiral Matthias Hemmsworth.
When she's not studying star charts aboard her father's vessel, she's most likely at home sewing constellations on blankets and articles of clothing.
Due to a recent mutiny attempt aboard said vessel, Luna has suffered from an acute case of paranoia, thinking that anyone might betray her at any time.
Luna's mother sent her to visit a friend's mansion for a while, to try to clear her head.