Eva - She might be surprised to find out that Juliette is not at all jealous of Eva headlining. Juliette has been the headline before in different places - she's really quite over it. And you can get more done when there aren't so many expectations on you. ;D Juliette has been polite and generally speaks of humans as if they're vermin but she has never explained why. Her past is her's and she doubts Eva would actually care anyway. But having a partner-in-crime on occasion is enough to keep her from writing Eva off and being too much of a snarky bitch. I feel like they sometimes sit around at night and people watch and just make rude comments about people they don't like the look of.
Kerr - Juliette might be a little suspicious but to be perfectly honest, even if she knew, she wouldn't say anything. She perfectly understands the need to hide or escape or whatever it is. If she could have changed her look to anything resembling normal again, she would have. Unfortunately, that option isn't available to her. Kerr likely helps her take care of the snakes she uses in her act - all boas of some kind.
Jack - since his mother was a snake charmer, I think it would be interesting if it was his idea for Juliette to work snakes into her act. I feel like she's absolutely commissioned him for a small portrait, just to see what she looks like now considering she doesn't cast a reflection. It would have been the first time she'd seen herself since she was 20-something. She would have cried - angry tears. And then she would have told him to keep the portrait - burn it, hide it, bury it. She doesn't care.
The Rev - Now look... When it comes to non-humans, she doesn't just eat willy-nilly but she'd definitely ask if he ever felt like volunteering. And to be honest, she's religious in her own way even if she believes God is the real bastard for letting children suffer as she's seen. The Devil at least gives them the chance for vengeance even if he isn't exactly kind either.