You know, if an author of a book, comic, screenplay, poem, whatever makes a character a certain color, race, sex, whatever, just cast that character that way. If the character's color, race, sex, whatever isn't specified, cast it any way you want. I really don't care other than try to cast the best possible actor as that is what is going to make the story most believable and enjoyable.
Like in Godfather 3. Michael Corleone's daughter's actress has to be female, white and Italian looking. She doesn't have to be the worst actress in the world, Sophia Coppola. Give the part to the best actress. Not the director's daughter