Rise-chan wrote...
LOLOL MOTHER.
Well, Jaina, the head of Crux found Luthica somewhere as an orphan and took her in, because of what Jaina did for her and that she was able to find a place which she could call "home," she decided to devote her life to a Crux Knight who'd be praised by Jaina, as she really admires her.
At least that's what I know about them.
... By that, it is not wrong to think that Jaina is Luthica's mother (not by blood, of course).