Aiwass led Sherlock to St. Genvieve Chapel.
—Yes, the place he intended to take Sherlock to perform the ritual was beneath the Candle Master Liturgy Chapel.
Although it seemed a bit inappropriate and somewhat irreverent... according to Aiwass's understanding of prayer studies, the Candle Master probably didn't care about that.
Because the Mithra God didn't truly exist, and the process of completing the ritual belonged to the Domain of Devotion.
Rounding up, this was also a form of worshipping the Candle Master.
"...Do we really have to come here?"
But Sherlock was evidently uneasy.
Or rather, Sherlock, who had grown up in Avalon, didn't truly understand what "fabricating gods" meant. In his mind, he still regarded Mithra as a real deity or a heretic god.
"Because we are in the city."