Most humans live on Rephidim, but a substantial contingent live in parts of Chronotopia and Sylvania. They are generally higher up in status and a little more intelligent than the average person, possibly due to more expensive upbringing. Due the mutating effects of the surface, even though there wouldn't normally be enough of a population base to support the wide variety of racial features found on Earth, examples can be found of various Earth-parallel sub-races of humans on Sinai. In fact, also due to the strange mutating effects, combinations of genes are possible that normally wouldn't occur on Earth (such as red hair and dark skin), or even stranger combinations ("anime hair").
Curiously, these same bizarre genetic variations can also be found amongst Abaddonian humans, despite the lack of functional magic there, suggesting that Abaddon may have its own level of "quantum uncertainty" even though machines demonstrably function much better there than on Sinai.
PC Requirements:
None.
[Known to those with at least novice Lore of Sinai]
The Captain-Astromancer of Rephidim Temple, for as long as can be remembered, has always been a human.