I'm looking for descriptive terms that can represent the individual concepts of the Id, Ego or Super-ego, not as a collective but rather a term for each of these terms. To put this into perspective, I've been working on an RPG pen and paper system for many, many years that is also a part of a collection of stories I'm writing. I'm currently fleshing some of it out but have become stuck on some of the terminology. The concept of the Id, for instance, to represent an aspect of a character is pretty much a perfect fit, however I don't really want to use the term Id as it's too clinical and has far too much associated baggage that would detract from the intention of the game mechanic. I can't, however, seem to find any alternative terms that represent the same basic concepts as these terms.