So, let's talk about the herbalist and the lies stoppered in bottles.
The creature's voice is low, almost reverent. "Poor influences are excised. The peace is restored. There are no painful, pointless dramatics. There are no complaints of aches and pains. There are no morning visits with lies stoppered in bottles. Everything that might serve as a distraction is… gone. The day simply moves forward in a simple, harmonious whole."
Honestly, I think that the most important part of this is the morning visits. This is not a one-off thing. This is a regular, repeated visit in the morning. A routine. Something that occurred daily. Which is weird. Because as far as I can recall, this is the first time we've seen something that the Kukuni has addressed that occurred over multiple days that is not the Perfect Day.
Additionally, I believe the morning visits with lies in bottles refer to the herbalist. I can't see any other person who would have routine access to an individual and be bringing bottles.
So we have the herbalist visiting routinely in the morning. And the kukuni knows about the herbalist and the visits, so presumably these visits were happening even after the kukuni's birth.
Additionally, the village Elder doesn't mention the herbalist at all. Nothing in their notes about them exist. But he does talk about medicine. Here's the relevant section:
Buried beneath the scrolls is a short draft of a letter marked to be sent out at the first possible chance. It is to an apothecary in Twelve Fields, cancelling an order the village recently purchased. "The illness has passed," the headman writes. "My people either no longer need the medicine or are beyond helping." At the end, he notes that he would be happy to put the recent payment towards more all-purpose cures instead.
So... we have a request sent to Twelve Fields for a specific medicine for a specific illness, but the need for that specific medicine no longer exists. Notably, the Headsman doesn't request specific medicines or herbs, just "all-purpose cures." Which is weird, right, because if the Headsman knew of the herbalist, you would think that they would have a list of medicines the herbalist is running low on and would request those specifically.
But the Headsman doesn't. Doesn't even seem to acknowledge that the village has an herbalist. Even when writing about how ill Liren is, the Elder doesn't talk about the herbalist, doesn't bring it up with Liyu to have the herbalist look at the ill Liren. Nothing.
My suspicion? The herbalist was erased before the perfect day expanded past Liren's house. The herbalist may have very well been the first one to be erased.
The herbalist was erased before the fourth of Bright Moon Deer. Before the complaint about the cattle was lodged against Liren. And, I suspect, even before the Headsman wrote the letter to be mailed out to Twelve Fields.
So..., we have an illness sweeping the town. We have an herbalist who visits in the morning with medicine? Poison? With something bottled. Something the herbalsit does is so offensive to the kukuni that the kukuni erases them from existence so completely that it is as if they never existed. The illness runs its course, and the Headsman pens a letter for Twelve Fields to switch up the medicines to an all-purpose cure. The fourth day of Bright Moon Deer comes, and the kukuni's field expands.
What could an herbalist be doing, with lies in bottles, that was so offensive to the Kukuni that it warranted complete censure?
My guess? Not treating Liren for the disease (or poisoning him). With an illness sweeping through town and not enough medicine to go around, the herbalist would have been presented with awful choices. Who do they save? I believe they chose not to save Liren and either gave them a placebo (under the guise of actual medicine) or attempted to poison him as a mercy (under the guise of medicine). The Kukuni took exception to that and destroyed the herbalist.