The hideout was very large, and it really begged the question how the previous leadership haven't noticed it.
The whole place was hidden under a large residential area. There was only one entrance, but a lot of different exits.
To enter you would need to go into a specific room inside the basement of a random apartment complex, which had a loyalist sitting at the front desk all day. About three people rotated as receptionists, and all of them would report if someone was snooping around.
Entering the hideout wasn't simple either. One had to disable a bunch of different deadly traps and alarms.
Lilith led Sera inside the main room of the safehouse. It looked like a mix between a large cave, a temple and a gym. The design was quite fascinating to look at.