User blog comment:B214/Random Discussion/@comment-1359322-20140823083232/@comment-73.178.133.185-20141020170235

I would go with Sona and her Peerage. The backgrounds of all but Sona and Tsubaki (and later Bennia and Rugal after they join) are vague at best and I'd love for them to be developed. What qualities led Sona to choose her members? I'm also interested in seeing what they were doing during the various events portrayed in DxD. For example, seeing her battle with Seekvaira. Who was the person she intended to recruit as her Knight? Etc.

I'd choose Sairaorg or Seekvaira for the same reasons. I'd also love to explore the families of those three more. As for Vali...he's already been developed quite a bit in the DxD and seems like he'll have a role in Slashdog. I'd mainly be interested in a couple of SS detailing the backstories of the members of the Vali Team (i.e. one for Bikou, one for Arthur&Le Fey, one for Kuroka).