Descriptive composition "Secrets"

In the story “Secrets”, the boy is Mary´s nephew. His role in the story is to be the boy who read the prohibited letters of his aunt.
He is a little bit naughty and a gossiper. This boy is naughty because he likes to be involved in everything, and likes adventurous things. That is why he was so interested in aunt Mary´s letters. He is a gossip because he needed to read the prohibited letters from his aunt; although he feels guilty at last when his aunt slapped him on his face and he started thinking what he did was not good.
His attitude towards himself is that he feels guilty and that is because he did a bad action to his aunt Mary and there is no way to turn it back because Mary is no longer alive.
Mary felt devastated by him because she trusted him, she thought that he was trustworthy but he proved to be the opposite thing.

I think that the best animal to compare the boy is a rat, because he is bold and dirty. Bold because he did what he wanted, not what he was asked and dirty means the guilt that he had inside. “When he felt a hardness in his throat he put his head down on his books. Tears came into his eyes for the first time since she had died and he cried silently into the crook of his arm for the woman who had been his maiden aunt.”