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

1.
compañero, ayudante, secuaz
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.
Batman y Robin son un famoso dúo de héroe y compañero.
•
Every great detective needs a loyal sidekick.
Todo gran detective necesita un compañero leal.