What subject pronoun would you use when talking about Ramon and I?

The personal pronoun that takes the place of two or more nouns or pronouns as a subject is we.

Example: Ramon and I are going to a movie. We will be home by ten.

The corresponding first person, plural pronoun that takes the place of two or more nouns as an object is us.

Example: Ramon and I are going to a movie. Dad will pick us up at ten.