Call me a hopeless goth, but I kind of like the Ninth House's funerary practices and I wish we knew more about them. At least, I like what they could be: what I imagine they once were, before their culture was shattered.
The Ninth as we see it is a civilization in its death throes. It's a utilitarian horror show, hollowed out by tragedy and stripped of all dignity and sentiment, but we have good reason to think it wasn't always like that. They have a history of fine textile production and poetry, and occassionally forming hero cults to celebrate cultural icons. There used to be families who raised their children communally. Before the sea of tiny coffins, the Ninth may have known how to live, and even how to mourn.
There are glimmers of what their death culture might have been like in Harrow's prayer beads: made from the bones of her ancestors, a tangible link to her history and community. And in Gideon searching for her mother in the leek fields, imagining that a woman she never met is still present in her life.
In a living culture with a functioning community, the use of human bone as a crafting material could make mundane objects into momentos, ways to keep loved ones close after their passing. The skeleton servitors could be seen as a way individuals continued to care and provide for the community, even after death.
If their dead are routinely exhumed to be added to the chore rota, it would make sense for the exhumation, cleaning, and raising of those bones to traditionally be a cultural ritual like a graduation or funeral. Most of those skeletons would have had living friends and family working alongside them, when the Ninth still had generations. The skeleton sweeping the chapel used to be someone's uncle. People in these cultures do mourn death. We've seen them with the corpses of people they knew, and they're not completely desensitized; just very weird. There's a throw-away line once about Harrow having a pet peeve about personalising the skeletons, which means it must be fairly common to do that. What was to stop previous generations of the Ninth from getting scolded for putting funny hats on Cousin Balbus's bones? Nothing, that's what. Balbus liked hats, anyway, so I don't see how it was disrespectful.
I'm sure Wake didn't get a ceremony when she was raised as a servitor; the main beneficiary would have been Gideon, and god fucking knows no one ever went out of their way to make her feel like part of the community. I'm betting no one does raising ceremonies for anyone, anymore. The Ninth is as good as dead, and no one ever taught the youngest generation how to mourn. But for ten thousand years, the Ninth successfully lived in very close proximity to mundane natural death. It's fun to imagine what that looked like.
