He's a superhero, that's what he is.
Beloved to the city, one of the founding members of the Latest-Superhero-Group, protector of the defenseless.
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He's probably bi or something, that must be why he fights for those queers- trans people can't have that much physical strength, much less his so-called "powers."
And, of course, he can't be gay; he has some sort of romance with Insert-Female-Superhero-Character. All the fans know it- there are ship names, there are people who dress up as them in incredibly creative homemade cosplays, even fanfiction. He probably doesn't want to dig that deeply into it, they say, but the authors tend to leave little notes asking him to visit and give an autograph.
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He must be white, of course.
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He must be little-known in real life. All the superheroes are. He probably works a little desk job somewhere, maybe Superman-esque with a journalism degree.
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He's got to be in his thirties or something, because everyone knows millennials can't work hard enough.
.
Of course, the Twitter Q&A in which he stated his "gender" is probably fake. Staged by those damn millennials. Why would a superhero claim to be a kid, anyway? And everyone knows you're either a boy or a girl. You can't be both. That Twitter account probably isn't even run by the superhero.
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The Intrepid Young Reporter, in their costume on the roof of a building invariably located in New York, snaps another selfie.