This RPG is an 'alliance' RPG. An alliance is a group of something (in this case horses) who believe in the same thing. In this RPG there are three alliances, the Lights, the Darks, and the Neutrals. The Lights are at war with the Darks, and the Neutrals do not know which way to turn.
Lights can sometime be called Blessed's, or Sacred's. They are kind and good always, but most of them are courageous and brave.
Neutrals can be called Confused, or Torn. They are good and kind at times, but evil at others.
Darks are called Shadowed, or Cursed. They are evil, unmerciful, and just genuinley 'bad'.
Of course it is not always as simple as this. Many Lights have bad streaks in them, and even the evilest Dark can be kind and loving to his dear ones. The character you create has to be one of these alliances.