now that i could reflect on the game's contents here is a ff16 verse. these points are not entirely spoiler free. some built on information taken from the archive, still is going to be tagged as spoilers so read with caution.
members of the fleuret family have their origins in the 'motes of light', the ancestors of most of sanbreque's nobility into which bahamut's dominants tend to be born. few descendants of these peoples migrated out of sanbreque's ever expanding borders and settled in a far eastern part of the northern territories, first given the name 'maniheim' and later simply called 'the dark land', now only separated from sanbreque and its capitol oriflamme by a large lake. though their blood mixed with other lines during the ages, the fleurets still have a high affinity with light magic and bahamut, which is why a lot of their noble blood has ties with the imperial family as both nations fostered an alliance in the past. blessed with divination and a connection with celestial bodies, some of them would even be sent to the empire to become highly valued astrologers to the ruling head and enjoy privileges no bearer could ever imagine.
due to the blight spreading after the collapse of drake's eye, the people had to flee and intermingle with sanbreque's society once more in the last seven to eight decades. while a large portion of the populous was lost, some others established small communities. the fleuret family however, became a controversial noble complex and political tools, ever exploited in exchange for the empire's 'hospitality', exposing biases and double standards in comparison to the treatment of common born bearers. basically, they are useful 'guests'.
similar to eikons manifesting in dominants, some of which already occurred before the downfall of the ancient civilization ( one example being shiva ), so would the power of celestial objects manifest in generations of the fleuret line and their nocturnal oracles, this includes the sun, the moon, and specific stellar constellations, eventually to be associated with deities. it is through this awakening that the myth of metia as a messenger to the heavens takes its roots, and that the moon, embodied by a lunar oracle, answers the prayers metia would bring her.
while lunafreya practices divination, so was she also born a talented medic to sylva, who under mysterious circumstances passed away, yet, the excessive use of that blessing wears on her body. her brother ravus, having joined the military of sanbreque's knights, hoped to ensure the semi-protected position of lunafreya and their sister stella within the empire, nevertheless, with sylvestre's growing greed, even she could not be spared to become an instrument for his wars, likely separating the siblings.
personally i would like her to reach beyond her 20's for once, thusly be around clive's age, and won't meet her end at least until after the second time-skip, if arguably so.
since luna so deeply enjoys gardening, she may or may not nurture an aether-blue variation of the otherwise white or lilac wyvern-tail, right next to a small chapel dedicated to greagor, where she treats the ailments of the poor whenever she is able.
affiliation wise, she is mostly neutral, but would find herself supportive of dion's revolt. for the emperor and the empress she feels nothing but cold indifference. to clive and his party she will potentially be The Cryptic NPC.