How does the author develop the character of the aunt?

The aunt is a nameless character that Suki does not offer a description of. She accompanies her nephew and two nieces on a train ride. She is not very good with the children. All the kids are fairly small and their aunt is unable to capture their interest. She has trouble answering their questions regarding their surroundings, so she decides to tell them a conventional moral story that fails to entertain them. When a unknown man points out the flaws of her story, she challenges him to tell a better one. The children do indeed enjoy the man's story more, however the aunt finds it improper. The aunt is a rather flat character, posing as a conventional authority figure.