henchman
n. <貶>心腹,黨羽,嘍囉
If you refer to someone as another person's henchman, you mean that they work for or support the other person, especially by doing unpleasant, violent, or dishonest things on their behalf.
1. someone who assists in a plot
The gang chief went everywhere accompanied by his henchman.
那流氓頭子到什麼地方都有手下的狗腿子跟著.
He has never regarded you as a friend, only a henchman.
他根本沒把你當朋友, 只不過把你當成了他的腿子.