User blog comment:B214/Volume 23 discussion blog/@comment-2208155-20170317165517/@comment-31137559-20170318153357

There is really no reason for someone who is already a king to become someone else's servant. While I suppose it's technically possible, it makes no sense whatsoever. Is Venelana Zeoticus's queen? Is Lady Phenex Lord Phenex's queen? No. People are just using Sirzechs and Grayfia. We have to consider that they both were already high-class pureblood devils and the evil pieces system was just being created. And Grayfia chose not to get her own set of evil pieces and chose to be Sirzechs' queen.