What is the appropriate (postpositive) adjective for this?

Many believed that John the Baptist was Elijah incarnate.

Where incarnate means

invested with bodily and especially human nature and form

But suppose I want to liken someone to some fictional character who exists but in the imagination, what adjective used postpositively would apply in that case?

This, for example:

His friends think that he is Bilbo Baggins....

Solution 1:

You can use the word 'incarnate', as it literally means 'in the flesh' - as Bilbo Baggins has never really been in the flesh, the 're' in 'reincarnate' doesn't make sense.

Lexico's definition:

(especially of a deity or spirit) embodied in human form.

E.g. His friends think he is Bilbo Baggins incarnate.