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...
I know there's a lot 
you've had to do without.
Aber ich weiß, dass du auch
 viel ohne mich machen kannst.
Sé que no dejé que te divirtieras mucho.
Sé que hasta ahora no te 
has podido divertir mucho.
Tu as été si patient 
jusqu’à maintenant.
Sei que até agora você sempre teve de se segurar.