After the funeral, peace returned to Grimmauld Place.
Dumbledore left with the real Horcrux, and Su Er did not ask why he had not destroyed it on the spot. After grieving before the little mound for two days and two nights without drinking a drop of water or eating so much as a grain of rice, Kreacher finally collapsed.
Yet after he regained consciousness, Kreacher seemed to have been reborn.
Although he still sneered at Sirius's status as his master, he did begin fulfilling his duties as a house-elf.
This also considerably reduced Su Er and the others' workload and made things much easier for them.
It had to be said that the Black Family Home, uninhabited for over a decade, really did contain all manner of monsters and bizarre creatures. Once, when Ron urgently needed to relieve himself, he entered a bathroom no one had ever opened and encountered a vicious, savage old ghoul. Fortunately, Tonks was nearby, dealing with the strange ornaments hanging in the corridor [though Su Er suspected she was doing something amusing with them].
Ghouls were not normally that vicious. Apparently, it was because Ron had shot the liquid he had been holding in for so long straight into the ghoul's mouth...
Little Ron had very nearly been split in two.
What a... pity.
Su Er was rather curious whether a wizarding hospital could repair that thing without leaving a seam.
That was not his only stroke of bad luck. On another occasion, Ron was nearly strangled by a set of robes that had been sitting in a wardrobe for who knew how long. Luckily, Kreacher arrived in time, or they would have been attending his funeral feast that evening.
These "amusing incidents" in their otherwise peaceful lives were nightmares for Ron, but a source