Puppetmaster13

 (1) I mean, even canon Muzan didn’t really care about world domination lmao. So in the Beemon AU he doesn’t care for such things twice as much. He’s more concerned about his Hive yeah. He doesn’t particularly care about the slayer corps either, save for the part that they’re a threat to said Hive lol. 

 (2) Drones! So like I’ve mentioned before, they’re a step removed from the hivemind, having been created by workers or moons. They look like a mishmash between human and bee, starting out more human-appearing, and becoming more beemon-like over the course of a year. Initially they can look like a canon demon, or more body-horror esque, it depends on the individual, who turned them, how much blood they were fed, etc. Coupled with the initial near-mindlessness, they’re usually pretty obvious, hence acting more akin to canon fodder compared to those attached to the hivemind properly. I wouldn’t say they’re slaves? If they can survive a full year without getting caught- or show signs upon transformation of becoming a Moon- they’re usually brought to the Hive, and therefore Muzan, to be properly let into the hivemind. And allowed the information of things like the Infinity Castle, because that kind of information the Hive doesn’t want slayers to know, y’know? 

 (3) Technically, much like IRL bees, another Queen could be created! Though not unless Muzan himself died, in which case the next eldest or strongest Moon would Metamorphosize into a new queen, Or, another is created much like he was initially. No one is going around using blue spider lilies in experimental cures to chronic illnesses in the Taisho however so… …Now, Muzan probably could create another Queen if the space was too small, and food was in excess, but with how the Beehive is in the Infinity Castle… I don’t think they’re running out of space any time soon lmao. 

 (4) As for a second Queen taking over another… I don’t think so? Grubs or pupas maybe, but full grown Beemons, I don’t think they could. Beemons are very much of the hive insect thought process of protect the Queen and making Sure the Queen lives, even if they themselves die for it. (To Muzan’s chagrin) There’s a good question with the Drones though, because they aren’t a part of the Hive technically, so hypothetically? If there was another Queen who took them into their hive before Muzan? Yeah that’s their hive member now. 

 (5) As I said in 3, if the Queen died, a Moon could metamorphosize into a new Queen, but there’s a hierarchy to it. The oldest or the strongest- or both, usually the longer you survive the stronger you are- becomes the next Queen, which is probably a good thing since the only difference really between Upper and Lower moons in this is that Upper moons are given Responsibilities. So the strongest should already be prepared to run things in a Hive. [Now, if one say, got thrown to another world or dimension or timeline or something, and there’s no other Beemons? Yeah they’re metamorphosizing into a Queen, no questions asked there.]

 (6) Lady Tamayo did sever herself from the Hive yes! She’s from a time when Muzan was far more hands-off with the hivemind (It’s not like becoming a bee-thing came with a manual, this man tried to eat a flower when he first metamorphosized from more human-looking to full beemon, which… yeah lol) -so Tamayo and several others did manage to escape the hivemind, though several returned of their own free will, and others died over time. By the Taisho era, yeah Tamayo and Yushiro are the only beemons not in the hivemind. Though they are technically Muzan’s, in the fact they’re from his bloodline technically. Tamayo herself isn’t a Queen, but she did metamorphosize from a worker to a Moon- even if she chooses to take on a more human form usually; same with Yushiro who is yet another step removed from the hive. 

 (7) The meat honey is based on IRL meat honey, like the kind vulture bees make. Though instead of road kill it’s human meat- so technically? It is edible to humans, but I wouldn’t recommend eating it lol. Probably would not taste good to the human tongue, plus cannibalism for those that care about that. 

So yes, Shinjuro would be from the Sengoku period, and Michikatsu from the Taisho.

Now you may wonder, why would Shinjuro become a demon? Well think about it. Imagine you've just lost your wife, imagine you have two young children, not even in double digits yet, imagine you've earned your Mark because you have to kill demons, because it's your duty. Now imagine you find out everyone age twenty-five dies. There's nothing you can do, nothing to fight against, no cure to search for, just a certainty in death approaching closer each month. You've lost your wife, and now you're going to leave your sons all alone as well, just because you tried too hard, got too close to the sun, and now it's burning you from the inside. You'd be desperate too, wouldn't you?

So that's how you get a demon Rengoku family, a three for one special for Kagaya or whoever replaces the demon king, if others are also swapped around.