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A foil character is a minor character which has traits that are in contrast with main character. It is used to make the traits of a main character emphasized.
The definitions of foil are:
To mess with. Destroy plan, or something good.
A thin flexible leaf or sheet of metal.
A light fencing sword having a circular guard.
1. A sign or symbol used in writing
2. The qualities that make a person, group, or thing different from others
3. A person who is unusual
4. A person in a story or play
5.character is the people...