Hi D-
Pretty confidant Scripture Teaches, a living person, should not attempt to communicate with the Dead.
(Lev. 19:31)
Pretty confidant Scripture Does NOT Teach, Departed Saved Souls communicate or appear to a Living person.
Seeing "visions" of "ghostly spirit figures"... certainly may be TRUE....but Yet Scripture Teaches...
Gods sends His Holy Angel's, (agents to do Work on behalf of God), in the Likeness of men...not Ghosts.
(Heb 13:2)
People who claim to have "seen" ghosts/spirits...probably "have"; but I would caution on the side of "Satan mimicking".
(2: Cor 11:14)
Clearly our Earthly Eyes, are part of our corrupt body, and our entitlement to SEE holy spirits...to SEE God; is clearly AFTER we are Raised in an immortal Glorified Body.
(1 John 3:2)
Regarding MARY -
Who knows what she looks like? A Biblical description? A Biblical Photo?
A Biblical Statue? Or the imagination of men's minds?
Where IN Scripture does it Teach, Mary will come TO men or Among Earthly men; in a vision, ghostly spirit figure, or Speak ...
after her Earthly Death?
I believe your Answer is in Scripture... inasmuch to what Scripture Does Say and Doesn't Say.
Personally, I would "rebuke" a "ghost/spirit" appearance, as a Trickster demon.
Glory to God,
Taken