The astrologer hoped that this was reversible and that a way could be found to heal the wounds, but for now, they needed to be hidden.
1) Use this:
To perform the ritual, it is necessary to sacrifice characters with a total health of 5000 or more (royal blood is available, but there are not enough subjects in this world, so it has to be done this way).
The character has an affinity for magic, and the spell learning speed is twice as fast for them (does not stack with other similar effects).
3) Ask her to cast this on Merel:
Removes negative effects from the character and heals injuries.