Unfortunately, there is no single word that can accomplish all of the traits you are thinking of. Even if there were such a word in terms of its strict dictionary definition, people would not assume it to include all of those things by common usage.
The fact that there is such a struggle to come up with something simple is indicative of the fact that there isn't something simple.
When playing the game, and choosing between the preexisting words used in the game (person, place, or thing), your only option is to use a descriptive phrase:
"By person, I mean a real or fictional thinking individual or entity."
All of those words need to be used in order to eliminate confusion over the use of any single word without qualification.
For instance, any of the primary words suggested in all of the answers and comments here could easily be assumed to only apply to the real world, so the phrase real or fictional has to be added in order to provide clarity.
Similarly, look at the main parts of the respective definitions of the relevant senses of individual and entity, per Merriam-Webster:
a particular being or thing as distinguished from a class, species, or collection
something that has separate and distinct existence and objective or conceptual reality
Both of those words, per their definitions, could apply to a human, a cow, or a teapot. But the idiomatic use of those words normally has people think of individuals as humans, and entities as non-humans.
Last, the adjective thinking also has to be applied, because it's not enough that you're talking about an unintelligent and inactive person, animal, or thing. You're talking about people, animals, or things that are aware and active (at least in theory or part, as in the case of Sleeping Beauty and its mostly somnolent victim).
