As far as I know, to be - is intransitive. But how does it happen that it takes a pronoun in the objective form?
This creature can be any one. It can be you, him, her.
Or are they not subjects? I mean you, him, her.
PS: Sorry, I confused the word "subjects" with "objects".
"You", "him" and "her" are not objects. They are predicative complements. There are only a handful of verbs that take predicative complements. One of the verbs is the word be (and its inflectional forms, namely is, are, was, were, and am).
Predicative complements can have both forms: objective and subjective. So these are perfectly grammatical:
It can be you
It can be he
It can be she
However, the subjective forms are very formal and sound stilted in normal conversation.
The verb BE is a linking verb or copula.
The subject of your sentence It can be you, him, or her is the dummy it.
The highlighted pronouns in your sentence are Subject complements.
