sidekick

Definitions

A person closely associated with another as a subordinate or partner.

A person who assists or works for someone more important or powerful.

Examples

The hero could not have defeated the villain without the help of his loyal sidekick.

She acted as the comedic sidekick to the lead detective throughout the entire investigation.

Synonyms

accomplice partner assistant associate wingman confederate cohort

Antonyms

adversary opponent antagonist rival enemy nemesis competitor