Use Core Rulebook and any other Pathfinder material allowed by your GM to make your character. Please note you can also be a Locansville or Kingsville Knight. See the page on Locansville Knights
A human can be any class he or she wishes but a knight must be a male and a paladin of Leesha must be a woman.
A human can be any alignment
All Good characters are members of The Network (see PC info page).Neutral characters can choose to be in the Network or to be one of Loerth's spies.
