sidekick
US /ˈsaɪd.kɪk/
UK /ˈsaɪd.kɪk/

1.
помощник, спутник, правая рука
a person's assistant or close associate, especially one who is less important than that person
:
•
Batman and Robin are a famous hero and sidekick duo.
Бэтмен и Робин — знаменитый дуэт героя и помощника.
•
Every great detective needs a loyal sidekick.
Каждому великому детективу нужен верный помощник.