The seals sunned themselves on the warm rocks. Intensive pronouns do not refer to specific nouns, although they may refer to identifiable persons or things. We gave them everything we had. Demonstrative pronouns identify or point to specific nouns. The interrogative pronoun who and the relative pronouns who had whoever have different forms depending on how they are used in a sentence.
Reciprocal pronouns refer to the individual parts of a plural antecedent.
As identical twins, they really do understand each other. She thanked everyone for helping. The crowd that greeted the pope was the largest one I have ever seen. They have only themselves to blame. People who are extremely fastidious often annoy those who are not.