Unless a fairy doomed you from birth to only tell the truth (like Tomas in Power of a Princess) you are a constant liar. Just like me and everyone else in the world. The interesting thing about lies is that most of us think we are honest—we underestimate how often we lie to protect our self-esteem. This means that your characters need to be liars too. But just like us, our characters always lie for a reason. And just like us, they often don’t realise they’re doing it!