After about a month of this, Emma decides to leave the lawn early- she's finished her letter to her parents, and wants to drop it at the Owlery- so Jenny is left to her own devices. Bored, she examines the forest. It's only supposed to be unsafe at night, right? It won't hurt to go wander around a little in search of unicorns. She won't go very far.
And if she's lucky- unicorns.
Half an hour later, Jenny is deeply regretting her idea. She is completely lost, and the forest has gotten much darker and gloomier. She would go back, if she had any idea where to go. She's taken to making little piles of rocks, to attempt to mark her way; unfortunately, so far all this has told her is that she is definitely going in a circle.
The next time she re-encounters a pile, she branches out to the left instead. She's pretty sure she came from that direction, so maybe-
Cold.
Jenny is friends with Miranda. Miranda has been compulsively researching Dementors all year; she knows what it means, this cold, the screaming terror. But it's so much worse than anything ever, ever said it would be. She's frozen to the spot, unable to move, brain screaming in terror.
And then the Dementor appears. Slowly but visibly, it approaches her. Is it bigger than the books said they should be? She thinks it is. It's already looming and it's not even close.
Frantically, crazy with fear, Jenny does the only thing she can think of- she shifts away her mouth.
The Dementor stops, seeming to hover in place. Jenny stays frozen in place. The Dementor doesn't seem to be planning to Kiss her... but it's not moving, either, and she's still stuck.
Oh, God. Now what?
"I guess," Emma says with a faint smile, "but I might just be grateful anyway. So um. So there!...or something."
"...I kinda want to tell the Prophet to call you the Protector of Hogwarts now, but I bet that's already actually something's name," Emma sighs.
"I will totally tell them that if you like it!" She pauses, then grins. "At least it gives us a couple years to come up with something more general for when you go on your Ultimate Mission. Miranda Swan, Dementor Destroyer, the Vengeance of Azkaban!"
"The Vengeance of Azkaban sounds like I am personally Azkaban and I'm mad at the dementors for - I don't know, abandoning me?"
"Ugh. I was going for 'upset about them haunting you' but I guess the abandoning thing is also valid. You are totally a Dementor Destroyer though."
"I would prefer Very Accurate Dementor Destroyer. It is very accurate that I destroyed one."
"You did!" She looks down and shuffles her feet. "I hope I can tell my parents soon."
"Yeah. I want to tell everybody in case they have ideas for how I can do it again. I'm kind of stuck on it until I know what's going to happen."
"But... I thought you said you could make the Patronus again? When you were testing?"
"I can. Just fine. I just can't get it near any Dementors from inside the castle. That part somebody is going to have to help me with."
"Oh. That kind of 'how to do it again'. Um. There's probably Aurors looking for Dark creatures after the Battle? Or something like that?" She falters. "I think I would... probably leave the hunting stuff to you?" She looks down and mumbles, "'m not as brave as you."
"It's okay, I don't need you to come along or anything," Miranda reassures her. "I'm just - fixated, not hinting at you or anything."
"I know. Mostly I know? I just," foot shuffle, "I feel so unhelpful. But- Dementors are scary, and I don't know what I'd do."
"...If you want me to think of things you could do, I can, but it doesn't sound like you want to, and that's also okay."
"Maybe.... maybe later? It might be less scary when I'm older, and know more spells, and stuff like that. And I don't want Dementors to exist either, and I want to help, I don't want to just abandon you to Dementors or anything! I just, um, for now they're scary."
"I totally understand. I wouldn't want to go looking for them if I couldn't dissolve them into nothing but their cloaks, either," Miranda assures her.
"I will have lots of chocolate for you when you come back though!" she adds firmly.