"No. Well, we can tell Tony and possibly Feral. We should not tell any adults. I don't want anyone knowing I'm a seer yet."
"How secretive do you want to be about your prophetude? Like, can we tell them at breakfast or do we have to draw them aside and swear them to secrecy?"
So after classes the next day, Bella (presumably accompanied by Sherlock) pulls aside Feral and Tony someplace nice and quiet, hopping with excitement.
"He gave me a prophecy," says Bella, after making quite sure they are unobserved, and she opens to that notebook page and shows them. "We don't know what it means though."
"Well... it sounds like it's about your immortality thing," says Tony doubtfully. "But it's pretty vague."
"My immortality thing also vaguely seems to be related to when I do and don't get mist trying to cast a Patronus," Bella muses.
"It's really weird!" agrees Bella. "But I still can't get more than mist, or mist with anything unrelated, so - I don't know what's going on at all."