A. stock characters
A stock character is immediately recognised by the audience. They are often not the main character in the book or play. Stock characters have no requirement to be developed by the reader. An example of a stock character is the 'hero'.
There's an entire WikiPedia article about this subject - click the link to learn all about stock characters.
a stock character in a play is the typical character in a play
Stock characters are instantly familiar to the reader, and will allow the reader to understand what's going to happen and how the characters are going to react without a lot of description and explanation.
You can purchase wigs and hats for your characters. Stock characters have more hairstyles than recruited characters.
Stock characters are familiar to everyone, so everyone knows what they're supposed to be doing and can enjoy watching them in their roles.
A good example of stock characters are Tom Walker and his wife from the story "The Devil and Tom Walker" by Washington Irving. http://en.wikisource.org/wiki/The_Devil_and_Tom_Walker
Stock characters are stereotypical characters that almost any reader would instantly understand, such as the farmer or the stuck-up snob. They're not annoying unless you rely on them too much instead of creating unique characters of your own.
A stock character is a fictional character based on a common literary or social stereotype Stock characters rely heavily on cultural types or names for their personality, manner of speech, and other characteristics. In their most general form, stock characters are related to literary archetype re often more narrowly defined. Stock characters are a key component of genre fiction, providing relationships and interactions that people familiar with the genre will recognize immediately. Stock characters make easy targets for parody which will likely exaggerate any stereotypes associated with these characters.
A set of characters with the same design are called stock characters. They were used in Roman and Elizabethan drama.
Commedia dell'arte flourished during the Renaissance (1450s-1600s) in Italy. The characters were known as stock characters and depicted a set of stock scenarios.