Responses
Because the responsibility that comes with telling them will be a big problem. It's too dangerous if she tells them. Many people will be after her , and other problems.
I'm not saying tell everyone I'm saying tell her family about it Especially her grandfather so that he can devise a plan to protect her.
Portal opening and saintess added to the story. ╮(￣▽￣)╭
And tbh why not tell them about you opening the portal already? At least they will know how to defend you if something happens.