@ThePickleBoss
No, because as explained a while ago by D, those parallel wills eating the mind are doing so "outside" (or on the realm of the administrator) but the demon lord is not an outsider nor an administrator unlike Kumo (whose administrator-meddling skills were granted by D, which may not be possible to obtain by those born in that world) so the demon lord cannot do anything like that or likely doesn't have parallel wills to begin with.
Akin to having a "
run as administrator" function