User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-31137559-20171114194456/@comment-31137559-20171115021107

Volume 2- Rias' volume. Got introduced to Sirzechs, Rias' brother.

Volume 5- Koneko's volume. Got introduced to Kuroka, Koneko's sister.

Volume 7- Akeno's volume. Got introduced to Baraqiel, Akeno's father.

Volume 16- Gasper's volume. Got inroduced to Gasper's father.

Volume 17- Rossweisse's volume. Got introduced to Gondul, Rossweisse's grandmother.

Volume 18- Irina's volume. Got introduced to Touji Shidou, Irina's father.

Volume 21- Butt Dragon's volume. Got(kind of) introduced to Butt Dragon's mother and his brother and sister.

Volume 24- Koneko's and Kuroka's volume. Get introduced to Thanatos. Koneko's and Kuroka's father? That's what I'm hoping at least.