Even though it's the place where most of the terror originated from, the mansion is also the only place big enough and able to hold all of them so they can help each other finally let go of all the fear and trauma. Eventually, some of them move away to their own places, but they are always welcomed back when they're in the city. Adrien always wanted to have an extensive family, but it takes him discarding the one he started with and growing his own before he finally achieves it.