sidekick

a person who helps a more skilled person <movie heroes invariably have a trusty sidekick, who often provides comic relief> Synonyms adjunct, adjutant, aid, aide, apprentice, assistant, coadjutor, deputy, helpmate, helpmeet, lieutenant, mate, helperRelated Words attendant, handmaiden (also handmaid), maid, maidservant, scullion, servant; auxiliary, legman, subordinate, underling; employee (also employe), hand, help, hireling, laborer, swamper, worker; gal Friday, girl Friday; man Friday, right hand; aide-de-camp