From Rise: The Vieneo Province

Charisma (Cha) measures a character’s force of personality, persuasiveness, personal magnetism, ability to lead, and physical attractiveness. This ability represents actual strength of personality, not merely how one is perceived by others in a social setting.

You apply your character’s Charisma modifier to:

Bluff, Diplomacy, Disguise, and Gather Information. These are the skills that have Charisma as their key ability.

Checks that represent attempts to influence others.