Foil. A foil is a character who contrasts with another character, usually the protagonist, in order to highlight certain qualities or traits of the main character.
A character who provides a contrast to another character is known as a foil. For example: In Toni Morrison's acclaimed novel Song of Solomon, Pilate and Macon Dead are foils.
character, sign
The term alpha characters refers to those characters that are letters. This is in contrast with numeric characters, which are numbers.
The anagram is contrast.
Contrast
Words, letters, punctuation.
A character is one letter
Sophie
Owl!
Rocket?
Edward Norton
contrast