Honestly, I feel like this can only realistically end in one of them stabbing the other and I'm not even sure who would be holding the knife at this point. Wakaba should just fucking walk, tbh.
She might be able to cure it if she's acts as a medium between them! Naked, of course, can't have any cloth interfering. And in a big soft bed, because it's a tiring process you know.
Talking her down is an interesting thing, but I somehow don't feel like it'll be possible. That said, Faye(?) is more sympathetic to humans now, maybe she'd be interested in coexistence?
OMG that was cute! Elsa is Evie's natural predator.
... still not clear what she needed to accomplish in the past, to fix the present, but I'm glad we finally closed the loop on their "forgotten" promise.