An alter ego is a term used to describe an alternate self, which is believed to be distinct from a persons normal or true original personality. It can be thought of as a persons clone or second self. The term is also used in literary analysis when referring to fictional literature and other narrative forms, describing a key character in a story who is perceived to be intentionally representative of the works author (or creator), by oblique similarities, in terms of psychology, behavior, speech, or thoughts, often used to convey the authors thoughts. Additionally, the term alter ego may be applied to the role or persona taken on by an actor or by other types of performers.

Some key points about alter ego are:

• It is a part of someones personality that is not usually seen by other people.
• It can be a trusted friend, the opposite side of a personality, or a fictional character that is the authors alter ego.
• It is a positive psychological hack and a way to embody different character traits, which one may struggle with.
• It is a choice and a habit, and it is like playing a role as an actor in ones own movie.

In summary, an alter ego is an alternate self that is distinct from a persons normal or true original personality. It can be a trusted friend, a fictional character, or a role taken on by an actor or performer. It is a positive psychological hack and a way to embody different character traits.