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...
but we rule this city in place of our parents.
aber wir herrschen als
 Stellvertreter für unsere Eltern hier.
pero gobernamos esta ciudad 
en lugar de nuestros padres.
pero nosotros gobernamos la 
ciudad en nombre de nuestros padres.
mais nous gouvernons cette ville 
à la place de nos parents.
mas nós governamos esta
cidade no lugar dos nossos pais.