Purging ghosts was one thing. Luring them to a specific spot was another. The former was easy. The latter was difficult, especially when the ghosts already had victims to prey on right in front of their eyes, why would they give them up just to follow Lia?
The streets was littered with corpses Lia could use, however, the problem was letting the mortals see the walking corpses would make them even more hysterical. So, Lia decided to first evacuate all the mortals until only she was visible to the ghosts.
Then she could use her corpses to lure the ghosts. A strategy that was quickly thought up but there was no other option for her at the moment.
She wanted to ask Yano for help but then remembered that he could only use one circle, in some sense it was indeed a restriction to his strong powers. Lia could now see the downside of it. If Yano drew a circle for her, he couldn't use his power himself.