Who is Laura from Short Story Masterpieces and what is their importance?

The character of Laura appears in the story, Flowering Judas. She is twenty-two-years old, American. and living in Mexico as an aid to the revolution. Laura works as a teacher by day and revolutionary by night. She continues to go to church on occasion, although her attendance there betrays her belief in the revolution. Her experiences eventually cause her to question her presence in Mexico/