From Rise: The Vieneo Province
Each character has six (6) ability scores that represent their most basic attributes. They are the character's raw talent and prowess. While a character rarely rolls a check using just an ability score, these scores, and the modifiers they create, affect nearly every aspect of a character’s skills and abilities. Each ability score generally ranges from 3 to 18, although bonuses and penalties can alter this; an average ability score is 10.
Using an ability successfully will advance your character in that ability. If you don't exercise an ability it will degrade over time.
Each ability partially describes your character and affects some of their actions.