That which belongs to her; the possessive case of she, used without a following noun.
Her; the female object of a verb or preposition that also appears as the subject.
She; an intensive repetition of the female subject, often used to indicate the exclusiveness of that person as the only satisfier of the predicate.
The subject or non-reflexive object of a predicate; she (used of upper-class ladies, or sarcastically, of women who imagine themselves to be more important than others)