Indirect characterization is the process of describing a character through that character's thoughts, actions, speech, and dialogue. An author will use this type of characterization to guide the reader in making their own conclusions about a character.
Indirect characterization is the process by which the writer shows the character's personality through speech, actions and appearance. When you watch a movie or television show, you can usually gather what type of person the main character is based on the character's actions and reactions in different situations.
