Hermione, as for her, waited for the end of the day to enter the potion room. Once all the pupils were gone, she closed the door behind her.
"I don't think I invited you in, Miss." Snape said without looking at her.
"In your talk to the first year students, you say you can teach them how to imprison somebody's soul in a bottle. Is there a potion for that?"
"Why don't you look it up in the library?"
"I did. I didn't find a trace for it. I think it was only invented by the half-blood Prince."
"Who are you?"
"It's complicated. Is there a potion for that?"
"It's more complicated than a simple potion."
"It's true, then. You did invent it. Is it possible to give this person his soul back, afterwards?"
Snape paused for a minute.
"With the right spell, yes, I think you could."
"If it could save the life of the Narnian champion, would you help me do it?"
"Why would I?"
It was not a negative answer. It was an inquiry. After a moment of hesitation, Hermione took out her wand, and ended her shapeshifting spell, thus showing her true self. Surprise painted on Snape's face.
"Miss Granger. Apparently you're not only a simple Miss Know-It-All."
"I am Hermione Granger. I am what she will be in three years. You know Lord Voldemort is coming back."
"He is going to try."
"He is going to succeed. On the night of the third task. And he will murder the champion who will be with Harry Potter."
"What makes you say it will be your Narnian friend?"
"Because I remember what happened. Cedric Diggory should lose his life this night. We are trying to avoid it. Edmund will take his appearance. I improved the Polyjuice potion recipe so it lasts more than an hour."
"How?"
"I added powdered asphodel petals. The transformation only ends with a spell."
He gave her an impressed look, and she couldn't help blushing.
"A dark entity took control of our world, and of Edmund's world. It feeds on chaos, by changing things in our destiny. It is vital that Harry survives his meeting with Voldemort, and reaches his seventh year. And this entity is trying to change that, and might try to kill him."
"What does it have to do with Cedric Diggory?"
"We are trying to avoid a pointless death. And the entity knows Cedric has to die. We are trying to trick it. Will you help me?"
"I will. I will prepare the potion and the container."
"Thank you..."
She put the spell on herself back on, and walked toward the door. She suddenly turned to him.
"I just wanted to tell you... you have been an excellent teacher. It was an honour to learn by your side. And I'm sorry. About Lily, and everything else."
"What do you know, exactly?"
"Everything. Dumbledore told me everything. You deserve admiration. Not disdain, and all the more not hatred."
He only replied by a nod, and she left for good.