I have a short wishlist re: Rosa's girlfriend.
(Note: I'm assuming the role has already been cast, and perhaps stuff already shot. But I don't have any spoilers, nor am I seeking any. This is what I hope will happen.)
I'd like to nominate Jenny Slate. Because I love her and she's gorgeous and she could pull off any persona, but specifically one of these three, each of which would amuse the hell out of me:
1. She's basically a female Pimento. Because Rosa has a very specific "type" and it's cray-cray. I know that'll be an unpopular opinion, since Pimento wasn't very well-received, although a lot of it seemed to be with regard to Jason Mantzoukas's portrayal more than anything. (Also, for the record, I can understand why some people might find it distasteful or otherwise problematic that Rosa's girlfriend would basically be a mirror image of a former boyfriend. I get it.) Anyway, Jenny Slate plays Jason Mantzoukas's sister on Lady Dynamite, and to me, they do look like they could be brother and sister. Not that she'd be Pimento's sister on B99, but she'd be a very similar personality type, because that's just what does it for Rosa, and everybody in the precinct will immediately recognize it. Hilarity ensues.
2. She's basically a mirror image of Rosa herself. Yes, Seinfeld did the whole "OMG you're basically dating yourself!" bit, but I thought it was funny then, and I think it'd be funny again on this show. May be more of a Gina thing, being as she's the narcissist on this show. But given how little regard Rosa seems to have for most people (outside of her friends and family) it kinda seems like Rosa would be attracted to someone who is just like herself, because she just can't with most others.
3. This one might be my favorite... she's just like Holt. And Holt (and Kevin) (and Amy) immediately ADORES her. And Jake thinks it's hilarious that "OMG Rosa is dating Holt!" Maybe nobody else really sees it, or maybe Jake AND ROSA are the only ones who see it. And Rosa thinks it's awkward that her girlfriend is immediately becoming BFFs with her boss (and Kevin.) Not to mention "Really? I'm freaking dating Captain Holt and I only realized it just now. WTF?!?" Or something along those lines.
I mean, don't get me wrong, I totally get why many/most people would want Rosa's girlfriend to have her own personality, and would hate for her to be just a caricature of another (especially male) character. But hey, it's a wacky sitcom. And I've got a hunch that she's gonna be a rarely-seen recurring character anyway, along the lines of Boyle's wife, or Doug Judy, and she might even end up being a one-off. So I wouldn't be surprised if they gave her some kind of sitcommy hook/twist/gimmick for the lulz. These are just a few of those that I've thought of, and I think I'd enjoy if they went that way. But in any case, Jenny Slate please!