That will be your room number. There's one inhabitable apartment building in this city. Sixteen of us live here. Seventeen now.

[He pauses, gathering his thoughts. This is never a very easy explanation.]

She's not a normal child. She has the ability to reach into different worlds, different universes, and pull people from them to stay here as her "toys" [actual finger-quotes included]. Time doesn't seem to matter. People have been brought here before, disappeared, likely back to their proper homes, only to reappear again at a later date with no memory of this place.

[His expression is serious, but he's doing his best to remain calm and open for Allen. This part sucks.]

You've been here before.