Is of A personalreflectiveor a intensive pronoun?

No, the Word 'of' is not a pronoun of any kind. The Word 'of' is a preposition, a Word that shows the relationship between a noun or a pronoun and another Word in the sentence. Example:

He brought her a bunch of flowers. (the preposition 'of' shows the relationship between the noun 'flowers' and the noun 'bunch')

A pronoun is a Word that takes the place of a noun in a sentence, for example:

John is her son. He brought her a bunch of flowers. (the pronoun 'he' takes the place of the noun 'John' in the second sentence)