non-character       
 noun [ C ] (also noncharacter) uk/ˌnɒnˈkær.ək.tər/ us/ˌnɑːnˈker.ək.tɚ/
 (电影、戏剧、故事中)戏份少的角色
a person in a film, play, or story who has no interesting or unusual qualities
  The actress did her best with this non-character.
 Apart from the two heroes, everyone else in the play is essentially a noncharacter. 除了两位主人公,剧中的其他角色基本上都没什么戏份。 
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- He was not able to provide his non-character with a single interesting attribute.
- The author uses a non-character to give information about the plot.
non-character       
adjective [ before noun ] (also noncharacter) uk/ˌnɒnˈkær.ək.tər/ us/ˌnɑːnˈker.ək.tɚ/
 非字符的
not using or consisting of characters (= letters, numbers, or other marks used in writing and printing)
  a non-character file format 非字符文件格式 
 the computer's non-character display
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- The document contains both character data and non-character data.