"Glimpse" is the name given to the humanoid inhabitants of the 'Realm', a parallel universe formerly united with and later adjacent to ours, wherein the story is set. They are largely similar to Grines, in that each Glimpse corresponds to a human in appearance, personality, allegiance/beliefs, and time of death, though not necessarily in age.
Glimpses have white skin and eyes that change color according to their loyalties. If a human chooses to believe that the "Story" of the Realm (also known as The Book of Alleble) is true, the Glimpse will side with King Eliam, the Godlike king of Alleble, whereupon its eyes glint blue; if a human chooses to scorn the Story, the Glimpse sides with the rebel Paragor (a Lucifer-like character who is the principal villain of the series), whereupon its eyes glint red; if the human does not choose either, the Glimpse will remain independent and its eyes will glint green. Similarly, if the Glimpse changes its loyalty, the human changes its opinion. The color signifying loyalty can only be seen when the Glimpse moves or from a sidewise angle; when seen from the front, Glimpse eyes are as various in color as human eyes, and may or may not match those of the human to whom a Glimpse corresponds.
Upon dying, each Glimpse is united with its human and transcends both worlds in favor of an afterlife. Followers of King Eliam join their master in a world known as the 'Sacred Realm Beyond the Sun', whereas followers of Paragor become imprisoned beneath his citadel, behind the 'Gates of Despair'.
I took that off Wikipedia. XD And certain humans get 'called' to The Realm by the Prince, so I think maybe something really bad could be happening and a few 13-15 year-olds who believe get sent there or we could just roleplay the glimpses.