...
The elephant in the room(*) is the lack of significant recurring characters of colour. You have Rawlings, Lamar, Sanya and Martha Liberty and thats about it. Chicago has a significant African American population which is virtually unrepresented.
I don't really count Lamar, he's a VERY minimal character; in chatter & forum-posts about the TV show, I think the term "token Black" would be used.
Rawlings is pretty minor, too; but there's some history with Murphy & her dad, so we've got a bit more depth & a positive portrayal. The character
could be expanded for TV (more lines, more scenes)... but suffers a
lot from being a Normal in the supers-setting, which is
not the look you want in portraying
equality.
Sanya, now, is a solid one! The man kicks ass & takes names... unless he's shooting the ass. Again, though, I think we need to see his role expanded a bit, given more lines & more scenes.
Martha Liberty is a mixed bag, representation-wise. Plenty of magical power, plenty of authority; but very
VERY few lines & scenes (bordering again on "tokenism"). I'd like to see more of her, to be honest! And I think there's plenty of scope for that in the TV show (without betraying anything core to the Dresdenverse or the Case Files (but of course we don't know her future arc, maybe she'll become a key character and some bit of TV-canon will be explicitly-contradicted by later novels (Jim's involvement with scripts&c could prevent that!))).
There's Susan, a Latina, but the "girlfriend" & "damsel in distress" frames are really strong around her; and when she turns half-vamp and reframes with power of her own, she moves directly off-stage & mostly stays there (barring
Death Masks) until
Changes... where Harry kills her. So... a problematic character, on several fronts.
Agreed that there are some characters (lookin at you, Alphas! Also the Wardens, as a group) for whom no race was ever established, or for whom it never seemed like a significant or relevant part of the character. I'd be down with any of them -- several of them, in fact! -- being explicitly non-Anglo.
Wizards, in general -- the world-spanning White Council, in particular -- should be VERY multi-ethnic... but mostly Asian. We presume magic power is largely equal among all groups, and the world is about 60% Asian, 17.5% African, and 17.5% European+North-American. So, equal numbers of black & white, but asian (including Indian) is about double black+white together.
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footnote-mark from above, added by me:
(
*) - There's another elephant, I've gotta say. When you move outside the Dresden fandom, some communities
*cough*LGBT
*cough*feminists
*cough* have a notably less-positive view. Dresden himself is
VERY male-gazey, and some of the ways he talks about (or doesn't) gay/etc issues really leave some readerships feeling like Dresden isn't the hero they need to read.