User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170410191626/@comment-31137559-20170412025231

I will admit, you got me there. And Issei isn't really Rias' servant anymore. Sure he'll always be her pawn and will have to participate as her pawn in Rating Games, but in the master-servant sense, he's not her servant anymore. That's why when a servant gets promoted to high-class devil and chooses to have a peerage, they are classified as going independent. Now Roygun is powerful and a beautiful female, but since she's a king, I don't see her becoming Issei's servant. And she wouldn't be a subordinate king. Issei is still Rias' pawn, but he is a king of his own and Rias can't tell him what to do with his servants. Now she has been demoted to high-class devil and is on probation right now and it will be a while before she can compete as a king in the Rating Games.

It's more of my personal feelings about not having Issei make those that are already devils into his servants. And even more so if that person is already a king. Now she might be interested in Issei, but if she wanted to become his servant she would have said so. Instead of stating she wants to be his retainer. I know she's powerful and a female, but can you state any reasons why a high-class pureblood devil WHO'S ALREADY A KING(can't use those like Ravel who decided not to have a peerage or Issei who's a reincarnated devil and had to rise up in rank to get his evil pieces) would want to become Issei's servant no matter how much she's interested in him. That's no different than those people that wanted Rias to be Issei's queen despite Rias already being a queen. He already has Roygun as his retainer and so making her his servant would take away from his potential battle strength in the future even if she takes up just one pawn piece.