User blog comment:B214/Question & Answers 5/@comment-72.220.143.12-20151012043030/@comment-24866657-20151014140732

@B214

So the same for Issei? I don't see any difference but the sons liked Kiba and Vali more. Sirzechs and Grayfia are working, Issei and his harem are working so they're just the same but different generation.