User blog comment:B214/Volume 23 discussion blog/@comment-2208155-20170324141406/@comment-10330822-20170324144305

It's like a servant, but not being a part of the peerage necessarily. If she is asking to be a retainer, it means she is asking to be able to be Issei's subordinate, like a knight to his lordship. So yes, it is the exact situation as Bova and Nakiri.