- An alter ego is a second self, which is believed to be distinct from a character’s/person's normal or original personality. A person who has an alter ego is said to lead a double life. Alter ego is also used to refer to the different behaviors any person may display in certain situations, like when with friends or alone etc.
- Example: “During the day, she was just a school teacher; the simple, quiet book-lover that most people overlooked. But by night, she was the leader of the most notorious rebel army that would soon take back their country.” (https://literaryterms.net/alter-ego/)