Maybe, but the ritual is exclusive only for royal family by law, that the king needed to adopt Daisy for her to be able to get that treatment.
No, she and her mom have royal blood and that's why it worked. The grandma was r*ped by a royal and had the mom. The mom was r*ped by the count and had Daisy.
They are, but in order to get the ritual approved to be performed by the priests, one have to officially become a member of royal family. It's not a matter of whether it'll work or not, it's a matter of whether the ritual is allowed to be performed or not.
Wouldn’t the healing done on Daisy that the king made the priest use also work for her mom?