Premanand Maharaj Ji

Whose moksha actually happens: the mind's, the soul's or the illusion's?

It is the illusion that is freed

The soul was never bound, so moksha is the end of ignorance and illusion. Experience that your true self was never bound.

The destruction of avidya (ignorance) is what is called moksha. Otherwise, since the true self was never bound, what moksha is there for it?