wah, the family is way more suspicious than appeared before this chapter. They are wielding charm magicks on the staff as they grow up, both to lure then there and to make them remain (and remain loyal. just look at the effect as they imprinted mc on the infant with it), and they have a way to track them down, as it was described as the "fruit of observation" (seeing as they can track, its potentially them who make them reincarnate in the first place. Although that is a long shot).