page 8 :
- random guy : ojou-san , we will protect you .
- main girl : banchou , thank you .
page 14 :
- main girl : ... mage yankee ...
last pages :
if you look closely , you will see that the "crystal" is actually not a normal hard crystal , it looks more like a wicker weaving container .
and the paper talismans are probably sealing up a demon king or something inside the container .
in a previous chapter , a cooking frog said : you humans are the monsters here . you want to free the demon king , right ? we are the guardians who will stop you from doing that .