The Red Moon is over. Roxus has a body that is sensitive to the existence of a Red Moon—no. Not because of gods or anything, but because the Red Moon seemed to be the beginning of all the misfortunes of her life. Daisy's appearance in the capital as Ariaster's new fiancée, the death of Eoin and Amaranth, followed by the destruction of their family, and their exile to the battlefield, and all the other bad luck that followed.
When a magus has trauma to something, they will become unstable. Of course, Roxus is also like that. Even after she became an Archmage, in her former future, she would need Lucifer to calm her body and mana, while trying to calm her own emotions. This time, coincidentally, she was also exhausted and she passed out because of that woman, so her condition got worse.
Roxus never sleeps well on Red Moon nights.