Gray story character who's blue (6)

I believe the answer is:

eeyore

(Other definitions for eeyore that I've seen before include "8's donkey friend" , "Piglet's sad friend" , "A. A. Milne's eternal pessimist" , "Miserable donkey" , "Pooh's gloomy donkey friend" .)

I've seen this clue in The Wall Street Journal.

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