Antonyms for "right hand person" include "left hand person," "supporter," "follower," "sidekick," "assistant," "associate," "underling," "lackey," and "second fiddle." These words all relate to someone who does not hold a high position of authority or influence, but rather works alongside or under another person. While a "right hand person" is someone who is highly trusted and relied upon for support, an antonym implies a lesser degree of trust and importance. These words can also suggest a power dynamic in which one person is dominant and the other is subservient.