Rosa Ruiz, of Wilmington, Del., prepares her Catrina costume for a Dia de los Muertos celebration in Philadelphia, Pa., with her daughter, Lila, 7, in tow. "When I become the Catrina, I become closer to my culture, closer to my home, Mexico," said Ruiz, who has been performing at Dia de los Muertos celebrations for four years. "Without the Catrina in my life I would be lost."