Harold & Harold
Around the same time as Nero and his team were entering the cathedral, dozens of trucks were being boarded by numerous teams of Neophytes. The relatively empty city was about to become crowded.
But while there were countless Neophytes getting ready to enter the city, the number of Initiates or Arcanists entering was very few. Besides manning the few key points of the city, it was bare of any soldiers.
This was something Nero had noticed as well, though he didn't voice his concern. While he absorbed as much information as he could about Lumina, his focus remained on his mission.
The cathedral had at least two basement levels, and potentially more. The first basement layer had been cleared of all obstacles despite the presence of fog, but the lower levels remained largely unexplored.