The power of the Holy Blood was quite frightening. It hadn't been easy for Jo to suppress it for so many years.
Marvin knew this. Wanting to completely suppress the power of the Holy Blood was impossible, so he had to find a way to guide her stably through the process.
He knew the most suitable master to tutor Jo, but time was pressing, and the Dark Side would be chasing after them soon.
They had to lie low first.
Marvin entrusted the mother-daughter duo to the Wood Elves. They could be considered having some power in Ruins City. By relying on Wood Elven spells, temporarily hiding the aura of the Holy Blood wasn't difficult.
Although some of those Wood Elves looked at Jo and Barbara with disgust, since it was Marvin's request, they could only comply.
When Marvin settled the two down, he promised to come back to get them in a few days and then left the area.
...
Next evening, on the eastern side of Ruins City.