User blog comment:B214/Volume 21 info & spoilers/@comment-26285797-20160320135645/@comment-1359322-20160320140636

We may still get a chance to see ExE. Just like DxD can be Great Red, the team, or Ise's new mode. Ishibumi is merely doing the same for ExE.

ExE is now the name for the lifeform from the other world and it may also be the name for Ise's new power-up.

Seriously is that so confusing?