Old V has become a child and has no memory.
And Aily only had half of her soul reincarnated, and half of her main soul was late integrated into her body due to the quarrel between Silver Dragon and Merlin.
Harry's twin brother Hsikous disappeared and came to the territory of the dragon clan.
Elder Yennas Leitana learned that not long after S woke up, he handed the child to him and told S that the child was the reincarnation of Aily. He also told S that the child's soul was not stable and asked him to take good care of him.
Aily's reincarnated child (a boy) had some flaws, and the soul fusion took many years.
After Harry received Aily's message from S, Old D decided to give him to Sirius, his godfather, and Remus.
Ten years later, old D is still the principal, and the little Tom Marvolo Riddle is now Vider Marvolo, the professor of Dark Arts at Hogwarts, and is loved by the students, while Remus is the Defense Against the Dark Arts professor, S is still the Potions professor, Sirius and Lucius each have a place in the Ministry of Magic, the Death Eaters have been captured in Azkaban over the years, and the madman has been expelled.
When Aily was ten years old and about to enter school, she decided to start chasing S.
PS. HP - Ruchan's continuation