Can she be used as a pronoun?

The Word 'she' is a pronoun; the third person (the one spoken about), singular, subjective personal pronoun. The pronoun 'she' takes the place of a noun for a female as the subject of a sentence or clause. Examples:

Mom will pick us up; she will be here at four.

Ms. Lincoln, she teaches second grade, is in charge of the reading program.

A personal pronoun takes the place of a noun for a specific person or thing in a sentence.

The personal pronouns are: I, you, we, he, she, it, me, us, him, her, they, them.