Diego's parents are described as animal scientists; they appear in several episodes, but their names are never given. There is also one other older sister, Daisy, voiced by Iliana Friedson-Trujillo (which makes Alicia a middle child), who only appears in "The Bobo's Mother's Day!" with Diego stating that she is home from college. Daisy celebrated her 15th birthday in "Dora the Explorer" Season 4, Episode 2 "Daisy, La Quinceañera," which aired on October 1, 2004. Diego states that Daisy is home from college in "Go, Diego, Go!" Season 3, Episode 4 "The Bobo's Mother's Day," which aired on May 9, 2008. That would make Daisy 18. Daisy appears in three "Dora the Explorer" episodes: "Dora Saves the Game," as a cameo in "Dora's Pirate Adventure," and "Daisy, La Quinceanera." This makes Diego the youngest child and the only son to his parents.