henchman
Definitions
A trusted follower or subordinate who performs tasks, often of a questionable or criminal nature, for a powerful person.
A loyal and devoted attendant or supporter.
Examples
The villain relied on his loyal henchman to carry out the secret mission.
The crime boss ordered his henchman to guard the warehouse entrance throughout the night.
Synonyms
sidekick accomplice minion cohort underling right-hand man lackey