"Wait, weren't you listening to what I was saying?"
Dumbledore waved a hand in front of the dazed Roy, interrupting his wild thoughts.
"Wait, I think I understand everything now."
After Dumbledore filled in the final missing piece of Sebastian's memories for Roy, inspiration suddenly struck him. At last, he understood the full story behind that diamond.
"What do you understand?"
"I understand now. Don't you remember? Sebastian's sister suffered from a special Dark Magic curse. Back then, Sebastian and that unnamed Ancient Magic user left Britain together to find a way to cure her, and they brought back that diamond capable of purifying Dark Magic. But for some reason, they failed to save Sebastian's sister. In the end, Sebastian must have been devastated. Then, just as those memory fragments recorded, he turned to studying Necromancy capable of reviving corpses, only to be killed by the Dark Magic creation he made from corpses and organs."
Dumbledore nodded after listening to Roy's excited explanation, though he did not seem particularly interested in this century-old family drama. He merely reminded Roy in an even tone.
"An interesting deduction, but it has little meaning. Those things are already in the past. We should look ahead. I wanted to ask how your Patronus Charm studies were progressing. Professor Snape told me your Potions brewing was quite good."
Dumbledore spoke like a parent urging his own child to study hard. Roy nodded solemnly after hearing him, thumped his chest, and promised Dumbledore.
"Don't worry. She'll probably be the longest-lived little sister in history."
Roy's hellish joke was as outrageous as ever. Dumbledore realized Roy was making a joke about Ariana and Sebastian, and his expression immediately darkened. Still, Dumbledore did not take it too seriously. As for those long-buried memories, he had other concerns in