Fólie se používají ve všech typech literatury. Postava, která vykazuje opačné nebo konfliktní znaky s jinou postavou, se nazývá fólie. Fóliové znaky mohou být antagonisty, ale ne vždy. Někdy fólie budou dokonce i další postavy vedle protagonisty. Když autor používá fólii, chtějí se ujistit, že čtenář získá důležitá atributy a vlastnosti hlavního charakteru. Z tohoto důvodu jsou fólie důležité dbát!
Character Foils in A Separate Peace: Gene vs. Finny
16 years old, athletic
Really good at academics and book work; wants to be at the head of the class
Competitive and regimented
16 years old, green eyes, athletic
Doesn't care for rules, in sports or at school
The best athlete at the school; doesn't really do so well in his academics
Gene is incredibly insecure. He second-guesses everything, including Finny's motivations for friendship. While Finny just wants to have fun with his best pal, Gene imagines a competition between them where Finny is trying to sabotage his studies. When he discovers he is wrong, he is so angry at himself that he knocks Finny out of the tree, permanently injuring his leg.
Insecure and jealous
Second-guesses things and is afraid to take chances
Finny is unlike most other people. He doesn't seem to have a bad or jealous bone in his body. He loves to make up new games with no thought given to any hard-and-fast rules. He likes to break the school rules and jump from the tree by the river or skip classes and dinner. He loves hanging out with Gene and sees him as his best friend.
Has no ulterior motives; motivated by his love of fun