The image the reader gets of Flora Grieves is tainted first by the narrator's mother's bias, then by the narrator's own views. As such, the reader is very far removed from Flora's feelings, and we cannot get a very accurate sense of who she was. Instead, we must assess her from the story that others tell about her.
Flora is a very conservative, puritanical woman who does not embrace change lightly or easily. She will not accept modern conveniences, because her religion (Cameroonian Christianity) forbids them. She sticks to the values and rules with which she was raised, obeying her father and church without question. Due to this, we might expect her to be a very hard, cold and boring woman, but in actual fact she is a very forgiving and pleasant woman.