CHARACTERIZATION is the process by which the writer reveals the personality of a character. This process can be done in two ways:
Characters are revealed by...
DOES - what a character does.
SAYS - what they say OR what others say about them.
THINKS - how they think OR how others think about them.
FEELS - the feelings experienced by the character.
LOOKS - what they physically look like.
There are also different types of characters:
PROTAGONIST
ANTAGONIST
FOIL
ROUND CHARACTER
FLAT CHARACTER
DYNAMIC CHARACTER
STATIC CHARACTER