A foil is a character that is the opposite of the protagonist, but not necessarily in a bad way. It only means they have opposite qualities--it does not mean that they are the antagonist of the main character. Antithetical character are normally their "enemies"--they are the antithesis. Think antithesis of the main character.
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Oligarchy is a government where only a few people have power but tyranny is when one leader holds power through the use of force. ... The Athens had direct democracy so allthe citizens could participate directly in government.
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90 percent energy will be availabe to them
I think the answer is immortality im not really sure