Before I dive even further down the church rabbit hole, it occurs to me to ask: where is it situated relative to the other graveyards? Is it far to the edge of town, or is it more central?

Regarding the Lullaby Girl incidents, where did the first report occur, and are there any reports in the area in, say, the 6 months prior of accidental or intentional deaths or comas involving a girl who would fit Ava's description, between the rough ages of 6 and 12? (Yelena is not great with determining children's ages in the middle of absolute chaos and doesn't know if Avatars grow up, so she'd be casting a wider net in an attempt not to miss anything.)