User blog comment:B214/High School DxD DX.4 discussion/@comment-2601:8C:601:5692:3D30:770C:CE5:1085-20170725134222/@comment-31137559-20170729162224

@BiteMetco A servant who rose up to the rank of high-class devil and got the right to receive evil pieces is vastly different from someone who was born a high-class devil who already had the right to have evil pieces. You can't equate the two. Issei and Ravel are not the same. Issei was a reincarnated devil who had to rise up in rank to become a high-class devil. Ravel is a pureblood high-class devil from a noble family who already had that privilege but decided not to become kings. All reincarnated devils start out as low-class devils and have an evil piece within them which makes them the servant of the high-class devil that reincarnated them into a devil. Through achievements they can rise up to the rank of high-class devil and have the right to receive their own set of evil pieces and become a king. But those reincarnated devils still have that evil piece inside them which still makes them part of their master's peerage.

High-class pureblood devils from noble families already have the right to receive evil pieces due to their rank and status. But does that mean every one of them wants to become a king? Does that mean it's mandatory to receive a set of evil pieces? No. You have clearly seen Ravel, Grayfia, and Kuisha who are all pureblood devils from noble families who had the right to receive a set of evil pieces. But did they? No. And you can't equate them to Issei considering that he is a reincarnated devil who is the servant of a high-class devil like all other reincarnated devils are and had to start out as low-class and rise up in rank to high-class devil to even receive his own set of evil pieces. Issei, Tannin, and Rudiger Rosenkreutz are all reincarnated devils serving a high-class devil and they all started out as low-class devils and had to rise up in rank. Ravel, Grayfia, and Kuisha are pureblood devils from noble families who decided to serve in another's peerage than have their own. They are two different things. Issei's in a peerage and has his own peerage because he's a REINCARNATED DEVIL. He had to be the servant of a high-class devil and have an evil piece inside him and rise up in rank if he wanted a set of evil pieces. While Ravel was already a devil and already had the right to receive a set of evil pieces since she's a pureblood devil from a noble family. But yet she decided to serve as a bishop in her brother's peerage. Yes high-class pureblood devils can do that.

@anon And why wouldn't they be high-class devils if they joined a peerage? If someone added a mid-class pureblood devil to their peerage does that not make that devil a mid-class devil? And plus Sirzechs' peerage are all most likely Ultimate-class devils. Where was it stated that they can't keep their rank? Why would becoming a servant change their rank? Issei's a high-class devil in Rias' peerage. So explain it to me why a pureblood devil from a noble family wouldn't keep their rank if they decided to serve under another devil and not receive their own evil pieces to create their own peerage?