It's so frustrating when the MCs won't reveal the whole story to the other characters for bullsh*t reasons, she could have just said that she felt that her power was being taken away and talked about the other kid that lost his abilities, even if they don't fully believe it at first they would at least investigate. Keeping stuff like that just to create drama later is dumb and lazy, if you intend to save a plot point for later just have the characters not know about it or actually give them a good reason to keep the secret..