Noah will get green hair at some point
- He had it in A Path to Greater Good, and his reflection's green at least...
Burk will have a majestic mount eventually
- He went to some trouble to try and ride the giant pigs
Nail's a Royal Guard in training
- It's been said they were trained from birth, and they're the only ones who seem to be allowed to wander around in masks....
Those missing weapons were, in fact, stolen...
By none other than Logan Alexander.- He does seem to have some sort of dispute with Burk, and we already know he's not a particularly nice guy.
- We've now seen the actual thieves, so apparently not.
Emporio Garrimon, "the man who betrayed the world"...
Is also known as King Baku.- He "betrayed" his world by going to another one to build Rauel. Which is his next project to create supersoldiers. Thanks to its digital nature, it allows to accelerate time.
- He hasn't shown his ears — because they are not pointy.
Rauel is the last remnant of high-tech civilization that was destroyed by the coming of magic.
Or, strictly speaking, the temple is their last refuge. Tobi and her parents were born already there.- Thus Tobi's supernatural ability to understand languages and interact with devices. Back then it was commonplace.
Rauel is a place to grow Tykebombs
Klaassen says that Tobi escaped a special orphanage. Although that has been jossed as a lie to get to Three, Lorg would be a perfect place for a high-tech facility, where warriors are brutally trained from birth, and Klaassen would make a passable overseer for it.