User blog comment:B214/High School DxD BorN Episode 10 Review/@comment-15929029-20150607083617/@comment-1359322-20150608125004

The fake Ise can only exist because of the JD fragment. That fragment is fueled by Rias' jealousy + Loki's curse, giving life to that fragment. It's not simply creating a fake Ise without base or simply through Loki's curse.