noun
mechanical doll; automaton; marionette; blind follower
Literally a traditional Japanese mechanical doll or puppet. Figuratively, a person who acts like a puppet, obeying orders without thinking.
江戸時代のからくり人形は、ぜんまいで動いた。
Edo-period mechanical dolls moved by springs.
He just does whatever his boss says; he's like a puppet.