In "Bless Me, Ultima," where is Ultima originally from, and does she feel safe living with Tony's parents?

Ultima is from the village Las Pasturas, where Tony's father comes from and where Tony was born.  She is old now, and, having no family left, is living alone when Tony's parents bring her into their home in Guadalupe, a town a few miles away.  Tony's parents open their home to "la Grande", as they respectfully call her, because they feel "it is not right that (she) be alone in her old age", especially since she has served others all her life (Uno).

I think there is no doubt that Ultima feels safe with Tony's parents.  She "slip(s) easily into the routine of (their) daily life", and is beloved by all the members of the family.  Ultima's sense of security, however, is not dependent upon her environment; she possesses a deep tranquility of spirit which enables her to remain serene anywhere and under any circumstances, even in the face of danger and death.  Confident that "the smallest bit of good can stand against all the powers of evil in the world", she unflinchingly confronts evil personified and cures the sickness of Tony's Uncle Lucas (Diez), and even in death, Ultima is secure with the knowledge of her "bond to the time and harmony of the universe".  Ultima bestows upon Tony the gift of her peace when she dies, blessing him "in the name of all that is good and strong and beautiful", and counseling him to "always have the strength to live (and) love life" as she did (Ventidos).