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TVTropes calls such a character The Watson: The Watson is the character whose job it is to ask the same questions the audience must be asking and let other characters explain what's going on. ...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/7863 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/7863 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
TVTropes calls such a character [The Watson](http://tvtropes.org/pmwiki/pmwiki.php/Main/TheWatson): > The Watson is the character whose job it is to ask the same questions the audience must be asking and let other characters explain what's going on. I don't know if it is desirable to have such a character (I'll let the more qualified people here answer on that one), but given the large number of examples (including from well-known authors) as well as the fact that TVTropes doesn't mention any downsides, I guess it is at least OK to have it.