The stars are right and the veil between the worlds is thinning, or so says Inaaya's instruments. They've been wrong before, but she's pretty sure she's got them right this time.
It looks to be a single person coming through. Prometheus sent Inaaya, because at five foot nothing and 98 pounds she's just about the least intimidating person who works for them, and the person crossing over is probably going to be terrified.
Inaaya has an elder sign in one hand and an athame in the other, because she might be the least intimidating person at Prometheus but she's also the most terrifying.