Pablo is a son of Jack & Sarah, and was briefly Stewie Griffin's foster brother. His sister is Li, of Asian descent, and has brothers of African, Inuit, Indian, and unknown descent each. He is of Mexican or Hispanic descent, and thus believes Santa Claus is also Hispanic. He sits sixth in the ethnicity rainbow and appeared in "Love Thy Trophy".

Before that, he appeared in the audience in "The King Is Dead" for the performance of "The King and I".