User blog comment:B214/Volume 23 discussion blog/@comment-188.241.89.129-20170510202700

I have a question, I'm still waiting for Volume 23 of DxD to be translated, but if anyone read it already, could you tell me who Kiyotora Shinra is? By that i mean whats her (or his) relationship with Tsubaki?

They are related if i'm not wrong, but what is their exact relationship? Brothers? Cousins? Of something else?