A foil for (someone)
Translation of "a foil for (someone)" into Russian
a foil for (someone)
контраст для (кого-то)
The witty sidekick served as a foil for the serious hero.
Остроумный напарник служил контрастом для серьёзного героя.
Definitions
A foil for someone refers to a character or person who contrasts with another character, typically the protagonist, in order to highlight particular qualities or traits of the other character.