Sidekick

Full definition of sidekick

Noun

1. (informal) An assistant to another person, especially to one's superior or more important person.
• 2012, May 24, Nathan Rabin, Film: Reviews: Men In Black 3, In the abstract, Stuhlbarg’s twinkly-eyed sidekick suggests Joe Pesci in Lethal Weapon 2 by way of late-period Robin Williams with an alien twist, but Stuhlbarg makes a character that easily could have come across as precious into a surprisingly palatable, even charming man.

Synonyms

• acolyte
• wingman