User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-2601:87:8300:20D0:4578:499D:F51A:F5E6-20190801024042/@comment-31137559-20190803154144

Ravel doesn't have a peerage though. There's nothing in the series that says every high-class devil has to have a peerage. You have to be a high-class devil or above to have a peerage but it never says that every high-class devil has to have one.

For example, Kiba and Saji want to serve under Rias and Sona respectively for the rest of their lives.

Sairaorg and his brother, Magdaran, have high-class devils in their peerage.

It is proven you can be a high-class devil but choose not to have a peerage. It seems to be an option whether you want a set of evil pieces or not.

If Roygun wanted to be someone's servant, then why would she choose to become a king?

Issei's peerage is not under Rias' peerage. Issei's peerage is his own.

Have any of Issei's servants expressed any desire to become a king of their own peerage?

Issei is a reincarnated devil so he would have naturally had to start being a servant and move his way up until he became a king. For someone that's born a high-class devil, they can choose to be king of their own peerage or not. Creating a peerage is a lot of work and would take a lot of time and money.

What does Roygun having a more active role in the story have to do with her becoming Issei's servant?

So you justified Vali's and Cao Cao's actions as members of Khaos Brigade by just saying they're competitive? You could justify Roygun using the king piece the same way by just saying she's competitive and used the king piece to compete with the top players. The ends don't justify the means for all three of them.

Again who's to say she won't be forgiven in the future for her misdeeds? You can say I'm using false equivalency but was the severity of what she did any worse than what Vali, Cao Cao, or Diehauser did?

Your justification for Roygun becoming Issei's servant was that she was banned from ever participating as a king in Rating Games ever again. But with her being on Issei's team and Issei being a hero of the Underworld, it's likely to rehabilitate her image and allow her to compete in Rating Games again in the future.

I'm not arguing whether it's possible for a king to become a servant, but why any king would want to.