@DANDAN_THE_DANDAN i think it's not "the second floor". All of special living doll that reside in grandfather's house can do that, thus they are called special. Its hinted when edward explaining himself at the start of debut procession, when they are asking edward's shadow whereabouts.
Uh oh. They said they are the only left since debut. So, it must be there exist a second trial
Uh oh. They said they are the only left since debut. So, it must be there exist a second trial