aw fuck yeah. Fuck Yeah. Lets Fucking Go. this is SO fucking up my alley. its so up my alley, in fact, that it actually reminds me of a few worlds that i've made based off of stuff i like to see. like god damn. but anyway, anyway, let me respond to these individually so i can get my thoughts together:
1 + 2: OKAY honestly, that's fucking ideal. that is incredibly ideal. i love characters from mundane contexts suddenly having to deal with shit that is way beyond their level, it's great. this gives me a chance to just make normal ass people with average ass backgrounds.
3: yeah, i'm even worse with naming things, so don't worry about it.
4: i come up with the lore before i come with the name, too, because i just suck ass with ames, so i am the farthest from being able to judge you, aha! but more specifically:
time period; i also enjoy that! it works the same in one of my worlds. high fantasy, every species you can imagine, some places are futuristic, some are modern and some are medieval. it's better that way, i think, because i work best with modern settings (i just like the mundanity with a touch of magic), medieval settings are good for plots because of the high-fantasy or DnD feel of taverns and adventurers and bards singing of tales and shit, and futuristic magic settings are just. fun. its just fun. it's fun to see what you can come up with in those cases, though i'd imagine that the most futuristic it would get here (beyond the library of tortures, of course) is modern + advancements that can be achieved using magic? architecture and technology would get a lot grander with the efficiency people would be able to achieve with their magic and whatnot.
people; also ideal! i would assume that there's also the dangerous stuff, such as dragons, lindwurms, hydras, kelpie and the like? so, like, the non-sentient stuff that you referenced. i would imagine that hte humanoids are what make up the cities and the towns and just generally society, while the feral stuff is more so the wildlife. and maybe also the pets, to some level. some people probably have sick ass domesticated fantasy animals, but i'd imagine it'd be harder to do the more powerful you get, and some animals are just not built to be domesticated, such as the kelpie.
culture; i see! i have more thoughts on that "longstanding feuds between species" thing, but i'll remark upon that later. but anyhow, anyhow, i'd assume the twins are kind of thought of as gods, then? it's also cool, because the way they work mean that the level of people who'd want to be adventurers would skyrocket because of the culture associated with them. 'course, there'd also be people who wouldn't, but i could imagine there being a lot of people whose whole thing is trying to get a higher reputation so they can catch the attention of the gods, even if that's not how it works? so maybe there's celebrities who are considered celebrities because of the sheer amount of accomplishments they have, so they have a story to rival the Twins', basically. and bards who are incredibly popular for singing the praises of those heroes or of the tales the Twins create, and people who've slayed dragons and climbed mountains in the name of reputation and whatnot. a big celebrity culture around adventuring because of the environment the Twins created, basically.
i also love the idea of the dead one's land -- maybe the characters have to cut through one of those areas at some point because someone ran ahead, or because they need the shortcut in order to get somewhere in time? i think that'd be fun.
magic; i see, i see. it makes sense that it depends on the species, and is also pretty interesting. magic in the world probably comes in a lot of different forms, then. the twins' chosen being able to learn /new/ magic, however, is infinitely more interesting -- i especially love the idea of enchantments and it coming through a deal. i'll keep that in mind for later, eheh.
regarding pairs, does that mean every person has a pair, then? i'd assume that there's, like, an infinite amount of things the pairs could be except the few that don't have duplicates. also, if the pairs are assigned from birth and the characters who get teleported only get their tattoos when chosen and transferred over, what about the characters who've always lived there? did they already have a pairing and it got swapped out, did they not have a pairing from birth, or do some people just not have pairs so they assumed it was normal, or did they have a tattoo but just never met their pair and then the tattoo changed when their new pair showed up? or maybe the tattoos only show up when both are born, so they just assumed their partner was really fucking late? that's all assuming it wasn't that they knew they were chosen from birth.
major cities; alright, so! here's where my thoughts come in.
i think that on land, the largest cities would probably be ones in areas with a lot of different climates. encompassing a seashore, a mountain, some woodlands and some flatland; full of a diverse lay of different types of species, all mixed up near the capital but less diverse and more specific types of species the farther out you get. after all, i would imagine that a lot of species would congregate together simply due to their nature -- like, werewolves live in packs, witches live in covens, whatever. there's better examples of that, these are just hte only ones i can think of. some species in a certain neighborhood, some in another; when it comes to cities that are simply in a certain territory, however, like one in a woodland, then it'd be back to being diverse, but only to those who would prefer to live in woodlands. you'd find a lot of faefolk and elemental spirits (dryads, nymphs, etc.) there, for example. they'd be mixed up with each other because they prefer to live in the same area and don't step on each other's territory, but sometimes, people might live in the same area because they prefer it and DO step on each other's territory, making htem incredibly hostile and leading to another split. for example, in the same area where there's dryads and nymphs and faefolk all mixed together, there might also be werewolves and kitsune who are mad at each other for stealing each others' prey. as such, while they'd both be more than willing to live in the same neighborhoods as the nymphs, dryads and faefolk, they would still not be caught dead in the same neighborhood as each other. same city, different neighborhood. it all depends on that.
i think, most likely, the largest cities in the WORLD would reside in the ocean, as there's so much goddamn space there and also a SHIT TON of species that live underwater. they have a lot of space, up, down, and in every direction as far as the eye can see, there are a lot of people who need to live there, they have pretty shit such as pearls and clams and a lot of rocks to build with, etc. etc. they probably have grand cities underneath there and have a lot of tourist attractions because of it. having a shit ton of tourist traps underwater would be fun, i think, if only to see the characters go there and get starry-eyed by all the pretty lights and pearls, only to get pulled back by one of the people who've always lived there because they might get one pulled over them here by a business shark. i like the idea of an underwater las vegas equivalent, too. that might be fun.
oceanic cities would likely all be independent due to the sheer differences between different areas of ocean -- water pressure, amount of light, whether it's hot or cold, turbulence up near the surface, etc. etc. as such, they also probably tend to be the most lawless. have you ever SEEN half of the underwater humanoids, anyway? sharp ass teeth. sharp. ass. teeth. some definitely are pretty well-governed with a good law system and decent guards and whatnot, but. yeah.
i don't think it'd ALL depend on species -- like, some cities probably pat themselves on the back for their diversity because their people are taught not to care about who they live with, but it wouldn't be harmonious. a lot of the lore of some would step on the others' toes, and it'd cause a divide in any town. same goes for species that simply tend to fight with one another.
5. i call the character who does realize.
6. alright, that all makes sense to me! we're writing eight posts for eight characters in different places all at once, baby, let's go. (<--- i dont actually mind this it's just a bit funny)
7. awww FUCK yeah, let's GO. i love that so much more than if they forgot anything, honestly.
8. alright, sounds good to me! that's a good age range for me, i think, though having one character who's a lot younger or a lot older might be fun. i like having a lot of age variance.
also, regarding actual roleplay details! there are 8 main characters total, so i would imagine it'd be an even mix of those who live there and those who don't. also, out of the pairings, it'd probably be something like. one pair with both from earth, one pair with both from vebreo, and then the other two are one from each? and then for our characters, we'd both have four, two from earth and two from vebreo (unless you have preferences in that regard, in which case i do not and i can play whatever else. i would just like at least one (1) character from earth.)
also, i call trickster and brawn because i have ideas for them. you can choose yours for the other two pairs :') otherwise, we can probably randomize it.
i may be forgetting some things, but my hands are cold and i am hungry, so whatever.
Winter Month: 2 
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