answer: Alice's father and #Person1#'s grandmother are both stubbornly independent and have strong characters.
documents: #Person1#: Alice, your father is amazing. He's 90 years old and he lives alone in that big house.
  #Person2#: I know. He doesn't like to ask anyone for help. My dad insists on paying his own bills and taking care of himself!
  #Person1#: That sounds like my Grandmother. She was always stubbornly independent.
  #Person2#: It seems that folks like my father and your grandmother are determined to be on their own.
  #Person1#: They see their independence as a kind of character strength.
  #Person2#: Sometimes they are too independent.