sidekick

1. N-COUNT Someone's sidekick is a person who accompanies them and helps them, and who you consider to be less intelligent or less important than the other person. 助手[非正式] [oft poss N]

His sons, brother and nephews were his armed sidekicks. 他的兒子，兄弟和姪子都是他的左膀右臂，他們都配備了武器。