* Simple Explanation: The quiet, introspective protagonist was a perfect character foil to the boisterous, outgoing antagonist.
* Focusing on Contrast: The kindhearted and compassionate heroine served as a character foil to the cold and calculating villain, highlighting their stark differences.
* Specific Traits: The character's unwavering belief in justice acted as a foil to the cynical and opportunistic nature of the detective, creating an engaging dynamic.
* Impact on Story: The presence of the wise, old mentor character foil helped the young hero realize his true potential and overcome his inner demons.
* Literary Example: Shakespeare uses the character foil of Polonius to highlight Hamlet's profound intelligence and internal conflict.
Remember: "Character foil" is a literary term, so it's best used in contexts where you're discussing or analyzing literature.