never let me go

what are shadow knights? (how do they become one? are they immortal? who do they work for?)

shadow knights are undead creatures like zombies or vampires. they're "reborn" from the nether after their death (usually because they believe they had a wrongful death or if they're powerful guards who would make a good addition to shad's army) or through a "ritual" (like laurance). they are shad's knights, they work to bring him back to power so he can rule the world. they CAN be immortal, but they have to "kill a person that means the most to [them], or a good handful of innocent people"; the most common way of a shadow knight gaining immortality is (if they were a guard before their death) to kill their lord—for example, sasha with joh, vincent with his brother and gene with the lord of boboros.

does shad work with the void/empty?

no! the empty/void is its own entity. shad actively worked AGAINST it with the other divine warriors. we see the empty in regards to shad a few times—when laurance escapes the nether (this is because ungrth broke through the realm barrier, which marked him with the emptiness) and when aaron is given void burns (from doing the same into the irene dimension)—but they aren't working together.

did shad get reincarnated into aaron?

aaron is a descendant of shad, and he saved aaron's body/soul from death and took it over. we don't get a direct answer as to whether aaron is shad's reincarnation or not.

my theory is that he's not a reincarnation—shad's soul/heart is still alive but sealed away in the nether. it's a similar way to how aphmau isn't irene's reincarnation. for example, garroth is esmund's reincarnation because his body died so his soul moved on, but because shad's never did he didn't get the ability to reincarnate. so aaron is just a descendant so his body is a good match for shad's soul/power, but he's not the reincarnation.

what exactly is the nether? (has it always existed? is it a seperate realm?)

the nether is a seperate realm (accessible by an obsidian portal opened in the overworld and a certain human sacrifice). we aren't given any details as to when it came into existence unfortunately :(. shad is locked there by the divine warriors after the war of the magi, so we at least know it existed before then.

i have a mini theory that irene created the nether as one of the realms used to battle with shad :3

does the nether exist in mystreet?

there's no mention of the nether in mystreet as far as i know.

do the jury of nine have the same reincarnation as the divine warriors?

nope. the divine warriors were irene's equals and all had relics which gave them immortality/the ability to reincarnate. the jury of nine were a special guard unit chosen by xavier to guard irene—they have specific powers linked to their titles but these can be relinquished. they don't reincarnate.

you could be confusing these because ivy was in the possession of shad's relic at one point and zane was searching for the relics too, but the jury just worked for zane and aren't actually linked to the warriors!

here's laurance to explain it:

other notes:

diaries is connected to mystreet via season six, and we don't learn much more than what we already know about the divine warriors

you can learn much more about different realms/dimensions about the empty in void paradox! here is modzilla explaining it in its most basic form