Chapter 7:
Kurama, the de-facto ruler of Looking Glass City, tells Koto that their mother is the black rabbit.
Chapter 8:
Kurama has been intellectually curious from a young age, and loved it when his father praised his inventions.  He wants to find what he can do outside of the Looking Glass City.
Chapter 9:
The identities of Doctor Shouko and Fushimi are revealed...
They're just there for... 
well, just in case.
Sie sind nur hier, um...
 Na ja, für den Fall der Fälle.
Solo están ahí para... pues, por si acaso.
Los he enviado para... bueno, por si acaso.
Je les ai envoyés 
juste au cas où.
Eles só vieram, bem... Só por precaução.