The blame game
Our story starts in the Dumbledore household. With help from her boyfriend Fawkes, her brother Albus' phoenix, Ariana has managed to come back from the dead... Well, sort of.
Fawkes said, "Let me go in first and tell him, Ari. He still blames himself for your death, I don't know how he will react to seeing you living and breathing again."
Ariana nodded. "Very well, but be quick about it."
Fawkes flew into the house through the nearest open window and landed on the table beside where his owner sat.
Albus smiled. "Ah, my dear friend, where have you been today?"
Fawkes told him, "Albus, I have something to tell you. It's... about your sister."
Albus' smile vanished. "What about her?"
Fawkes explained, "I have been following an inventor for the last few months and he finally did it. Ariana drank the potion and she's alive. Well, as close to the old version of her that we can get anyway. She's outside right now and she wants to see her brother again."
Albus muttered, "She said that, did she? Ari said that she wants to speak to the man who murdered her?"
Fawkes stated, "I told you to stop blaming yourself, nobody truly knows if you or Gellert killed her. Albus, it was just an accident."
Albus frowned. "Very well, let her in then."
Fawkes took off and pulled the latch which his owner had built onto the door for him.
Ariana entered and her smile lit up the room instantly.
Albus' frown was soon gone and he had happy tears in his eyes. "Ari, is that really you?"
Ariana beamed, "Yes, Al. It's me."
Albus pulled her into a hug and whispered, "I have missed you and I'm... sorry about what happened. It was all my fault."
Ariana reassured him, "It's alright, dear brother. I don't blame you or Gelly for my death. Let's just put it all behind us, shall we?"
Albus smiled ever so slightly. "I can do that."