Humans, beings which live on Earth, are the mirror-twins of Glimpses, living in the Realm. While they may not be the same age as their Glimpses, they have the same character traits, and whom they follow (Paragor or the King), either on Earth or in the Realm, affect whom their Glimpse/Human follows. Also, when a Glimpse/Human dies on the Earth/the Realm, their Glimpse/Human, dies as well. (E.G., Captain Valithor's twin, Grampin, had been a follower of the King for many years—Captain Valithor was also a follower of the King. When Grampin died of a heart attack, Valithor died from an arrow.)
Humans have 'pink' skin, unlike the pale skin of their Glimpse twins. Their eyes do not glint a color.