The Kisaragi family are the second family of the Duodecim. They place no importance on bloodline and all that matters to them are one's abilities.
As the second of the Duodecim, the Kisaragi family are known by the other Duodecim as being extremists who border on being mercenaries. This is largely in part because of their tradition of not caring about bloodline or relations, only caring for the talents of their members. To this end, the family is nothing like a traditional one, contrasting greatly with the Yayoi family; despite this, the families remain in good relations with one another and the Novus Orbis Librarium. The other Duodecim, however, do not view the Kisaragi in a positive light.
The Kisaragi's obtain talented children across the world through unknown means, and give them both an advanced education and combat training before sending them to the Military Academy. One's origins play no part in how they are adopted.  It is because of this that the Kisaragi's produce a high number of quality soldiers for the NOL. The nature of the family has also led to internal power struggles, and some members have hired assassins against others. Jin was noted to be a frequent target of assassination in the Military Academy since he presumed to be the next family head, being targeted by Shiori Kirihito and having Taro Sasaga'e positioned as his bodyguard. 
Like the Yayoi's with the Sealed Weapon Izayoi, the Kisaragi's history is entangled with the Nox Nyctores - Mucro Algesco: Yukianesa. Seven was its first wielder and concealed it from the rest of the world after killing Eight and lying that she had stolen it. Somehow, the Kisaragi's lost the weapon, but it soon returned to their hands when they adopted Jin, who was found wandering with it.
One of the families of the Duodecim. ‘Kisaragi' means ‘the second moon.'
They attach no value to bloodline or social standing. One's abilities mean everything in this family. They gather talented children from around the world by various methods, and train them thoroughly in combat. 
- BlazBlue: Continuum Shift, Teach Me, Miss Litchi, Episode 4 - A family's reputation can be tough meow
- BlazBlue: Remix Heart, Chapter 19
- BlazBlue: Central Fiction, Library Mode, Organization #02