User blog comment:B214/Talk About What You Want! 3/@comment-16281343-20150628182524/@comment-3965848-20150628190308

I think it could be stand alone Issei or him with every main girl hinting that he finally acknowledges that they're his harem.

When he does acknowledges that, I think it'll activate his sub-species BB which his armor will be "King" based, for finally becoming a Harem King.