User blog comment:B214/Question and Answers 3/@comment-69.166.65.98-20140927003031

And it depends on how you take what happend when DxD was formed. Arthur gave Le Fay to Ise to be his migician and to protect her. And Vali told Kuroka to stay at Ise's house and he would call them if needed but then Azazel told Kuroka that Ise and Rias would keep her under there watch. So it depends on how you look at it, Arthur took his sister aout of team Vali and Azazel pretty much took Kuroka out also. Also First Gen told Bikou.

“Bikou, I will summon you if it’s necessary~. I won’t allow you to decline it.”

And if that is he case that just leaves Vali, and Arthur. But like I said it depends on your view point but it does kind of tie in  with Arthur hinting at having a deadth flag.