genius
/ˈjēn-yəs/
noun
an attendant spirit of a person or place
a person who influences another for good or bad
a strong leaning or inclination : penchant
He has been accused of being his brother's evil genius.
adjective
showing or suggesting great cleverness, skill, or originality : brilliant
Remember how genius Henry Winkler was on Arrested Development?
noun
the pervading spirit of a place
a tutelary deity of a place