"I wear a mask. And that mask, it's not to hide who I am, but to create what I am" speaker of comic books (6)

I believe the answer is:

batman

(Other definitions for batman that I've seen before include "an American hero" , "valet" , "Comic/film superhero" , "Cartoon hero or officer's servant" , "Cartoon hero of Gotham City" .)

I've seen this clue in The Washington Post.

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