User blog comment:AquilaeAltair/OnS Theories (S3). Fourth Theory - Mahiru’s deal with the First Progenitor/@comment-36009152-20190830235741/@comment-38762161-20190903054454

Yes, it does sound as an option but the issue would be that if Shikama possessed her totally, Asuramaru would have reacted the same way Raimeki did with Kureto.

Demons in general don't want their hosts to use other cursed gears; which is seeing with Noya in the catastrophe; likewise, Shikama was smart enough to move out from host to host in order to make lesser moves about himself