Is the underlined pronoun in the sentence first person, second person, or third person? Thanh brought you pho, a Vietnamese noodle soup.

Even though you didn't underline anything, there is only one pronoun in the sentence, and that is the word you.

The pronoun you is the second person pronoun, and it sounds the same in the singular and plural forms. First person pronoun singular would be I, and plural we. Third person singular would be he/she/it, and plural they.