Maybe. But the longstanding theory is Valravn will infect Emily. And the setup for that potential interaction was just clicked into place this last update.
Could be he infects her, I have thought about that before. Heck, I'm pretty sure I've posted about the possibility, but Ella's
seen Val, heck she had him so weak she could tie him up for who knows how long. If Val was compatible, she probably would have seen it. She might have said something like, "Well, there was one, but I couldn't guarantee he wouldn't just kill you," because she doesn't seem to want to lie to either Emily or Christie. Really stretch the truth sometimes, but not out and out lie if she can help it.
Maybe he does, maybe it's Shadow like Tahxeol says above me, but she might instead be infected by the thing that killed us in Too Powerful, too Soon. The being I'm pretty sure is supposed to be the Lord of Dark, who I think Val was summoning at the time, and who we allow him to summon if we distract Ella long enough that she doesn't interfere in his fight against her kids. The thing that has always been weird about it is that it refers to a bride, not a twin or sibling, when it is saving Val when he was just a raven. (Wait. . . did I just figure out now that Valravn's name is just
Valiant
rave
n put together. I feel a little dumb for not figuring that out before.) Plus, it seems to be the only being with some form of both powers (It has a light hidden in the darkness, from what I remember of that path.) which implies it might be able to give both to someone, even if the light it has is borrowed or stolen from it's dead bride. It might even be that Val asks his master to save her, as he sees that she could be it's Chosen, and have it descend into the world to give her it's powers.
The only other thing I'll say about it is that it just so happens to fit Emily's personality better than Darkness alone. Emily likes being goth, absolutely, but she is also kind and considerate. Heck,
she's the one who wakes us up when we are lying in the park on our first day as a new superhuman. I don't think the park was empty save for us and Shadow, but even if it was, we could have been dangerous to her, but she just walks up and wakes us up. That doesn't feel very dark to me, but it could be because she could just tell we weren't going to hurt her. As if she could see that in our soul, we weren't going to harm her.