User blog comment:B214/General Discussion/@comment-27083298-20161027142216/@comment-1359322-20161027145414

Nothing meaningful actually just that Kiba was originally planned as the MC and Issei as the side hero. Though it's unimaginable at this point.

The next tweet after that was much interesting though.

https://twitter.com/ishibumi_ddd/status/791647520149516289

If Issei wasn't the MC, then Xenovia, Irina and Rose wouldn't have been created... O_O