Humans can be found on all four of the higher realms and have successfully adapted to the new cultures around them, though they have not forgotten who they are. Midgard may be far out of living memory now, but no matter which world they settled on, their pride in being Human has not wavered.
There are no minimum physreps for playing a Human, though it is expected that Humans will mimic the cultures of their new homes.
Below is a specific look at Humans from each of the four higher realms