And I really can't see Faye reacting to the news about Claire (if she ever finds out) with anything more than a casual shrug. Hey, as long as Marty's cool with it, that's fine by her.
I think most people should react. I think the only character who should just give a shrug like when she told Marten would be Tai(And maybe Momo? She is Polite Bot 9000). Faye should be surprised. Then probably a bit politically incorrect, if well meaning.
I'm not saying people shouldn't or won't react, but I can't see
BenRG's scenario happening either, among any of the characters. Basically, I've been considering this as a word association game. Pick a QC character, give me a word or two describing their reaction to learning about Claire. Some of them might be negative (I see Dora as "snide," and Marigold as "Mmmmph!", assuming Momo's social protocol programming kicks in in time), but I can't see anyone, least of all Faye, reacting with "shock." In my mind, Faye's reaction is "blasé." I don't doubt she'll be mildly surprised and might initially say something blunt, but ultimately I see her taking her cues from Marten. He knows she's trans? He's okay with that? Well, good for him, and best of luck to them both. She pretty much gave them her blessing that night at the bar when she first nudged the baby duck in Marty's direction, so she'd be a jerk to rescind that now.
Plus, I'm sure Claire is savvy enough to know when the best time to come out to Faye is, and how to get the best reaction. She did it with Marten at the lake house, when she decided to see just how serious he was when he called her a friend, and she was able to turn coming out to Emily into a teachable moment, so I'm sure she knows how best to handle Faye. Unless she
wants to shock Faye into having a "Dude, your girlfriend is
trans!" moment, just to get revenge for
that night at the bar. But maybe wait until Faye has something (non-alcoholic) to drink, first.