Solopsist (3.5e Trait)
From D&D Wiki
You think that everything around you is fake, a creation of your own mind.
Prerequisite: Neutral Character. Law, Chaos, Good and Evil are just part of your mind, so why would you care about them?
Benefit: You gain a +1 to Will saves
Drawback: -2 to all CHA/WIS based skills.
Roleplaying Ideas: You are indiferent toward the world, emotions, people and even danger! Though you might actually believe that parts of this "creation of your own" might actually be real.