What are the character stats for betrayal at house on the hill, and how do they impact gameplay and potential betrayals?

In Betrayal at House on the Hill, each character has different stats: Speed, Might, Sanity, and Knowledge. These stats impact gameplay by determining a character's abilities and strengths. When the haunt is revealed and a betrayal occurs, the traitor and the heroes may have different objectives based on their stats, leading to strategic decisions and potential betrayals.