User blog comment:B214/Question and Answers 3/@comment-4547267-20140918152834/@comment-24098614-20140920101633

The answer is the same as what B214 said because Kiba has too much honor to accept this type of request in the first place, and secondly Rossweisse had every intention of asking Issei first before even considering Kiba but this is my opinion because when she requested this it was intentional and with a purpose.