User blog comment:B214/High School DxD Born Final Episode Review/@comment-3965848-20150621165032/@comment-16281343-20150621165444

"instead of actors Issei and Rias are the ones playing the roles of the show and so probably others also (Kiba, Koneko etc)"

It will still be the actors that will do the work on the show. Issei and the others only do Oppai Dragon stuff for meet and greets.