I'm digging the black back one.
As for the other one, I can't help but think there's something more than normal going on with her, but the only real way to tell if she's a fire is to pair her with a fire. I doubt pairing her with a black pastel is going to tell you anything. At best, you'll get a few that look a lot like her, with the same question mark, as well as a few black pastels that "might" be fire. You gotta go for the super to know for sure.