Abstract: According to the possible worlds theory, there are three types of alethic logics, i.e. necessity, possibility and impossibility.  Literary works can then be seen as a specific possible world: fictional narrative world, while characters are its inhabitants. Taking into consideration the accessible relation of the fictional characters with the human beings in the real worlds, we divide the fictional characters into plausible characters, physically impossible characters and logically impossible characters. These three types of characters cover all the character types in fictional works. Possible worlds theory provides a new research scale and theoretical framework for categorizing character types as well as for constructing a theory of characters.

Key words: possible worlds theory, types of characters, implausible characters, physically impossible characters, logically impossible characters