We temporarily stopped arrivals with a ritual in the book. It was a one-use thing but no one came in for months. She was... quite upset after that. Especially since she didn't know we did it at first. Rin and Haru did a good job pretending it was only one person doing it instead of a team effort.

... That book is how we figured out the Fog had a heart and what lead us to use the Night God's typewriter. We could actually kill her if we could permanently kill all her followers at the same time.

[They can talk about it later. A lighter conversation after all of this...]