Nico Márquez is Diego, Daisy, & Alicia's father who appeared on Go, Diego, Go! He is Miguel's younger brother and Valerie's youngest son and Elena's brother-in-law and Dora, Isabella, and Guillermo's Uncle. He is also Sabrina's husband. He has peach-brown skin, brown eyes, and black hair. He usually wears a blue shirt with a tan vest, khaki cargo shorts, and gray and brown shoes.