noun /ˈeɪ.ʤɛnt/
Heaven made us agents, free to good or ill. Dryden.
b) One who acts for, or in the place of, another (the principal), by authority from him; one intrusted with the business of another; a substitute; a deputy; a factor.
I see in him [Moby Dick] outrageous strength, with an inscrutable malice sinewing it. That inscrutable thing is chiefly what I hate; and be the white whale agent, or be the white whale principal, I will wreak that hate upon him. Herman Melville, , ch. 36
Wikipedia foundation.