Here's Elena's so you can get a better idea of how the stats are determined. Each stat does a certain amount of things but here's the core of them:
Vitality determines hit points.
Strength determines attack power.
Agility determines movement speed in a turn.
Endurance determines the character's base defense.
Willpower determines mental resistance.
Discipline determines the resistance a character has to going insane.
Intelligence determines the character's magic pool.
Perception determines a character's perceptive range.
Charisma determines persuasion chance.
Luck determines a critical chance.
Skill determines a character's added bonus to their unique skill attempts.
Special: The percentage of the character's grasp on their special ability and to what extent they're able to use it.