Don Mateo is Camino and Tía’s friend and neighbor. His gruff demeanor hides a caring, protective, and loving personality—he drives Camino to the airport to meet Papi and later to meet Yahaira, and he also spends a lot of time sitting with Tía and comforting her after his death is confirmed. Additionally, he set up a doghouse on stilts in his backyard for Vira Lata to use when their neighborhood floods.