Arthur Morel is the youngest child of Mr. and Mrs. Morel and the younger brother of William, Annie, and Paul. Arthur is a happy, lively child and, out of all the Morel children, he gets along best with Mr. Morel. He grows into an energetic young man who is often careless in his pursuit of fun and is constantly getting into scrapes. Mrs. Morel worries about Arthur and finds him tiring to be around because he is so active and extroverted. Arthur takes a job in a factory but is unhappy there. One day, on a whim, he and a friend join the army. Arthur regrets this decision immediately and asks his mother to pay his way out. This shows that Arthur is irresponsible and does not expect there to be consequences to his actions. His time in the army disciplines him, however, and brings the optimistic and determined side of his nature to the surface. He makes the best of his circumstances and, when he is at last discharged, he marries Beatrice Wyld and becomes a hard-working and responsible husband and father to their child. Arthur is very comfortable in his body in a way that Paul is not. It is insinuated that, unlike Paul, he is not ashamed of his physical and sexual prowess and, instead, shows his body off when he is with Beatrice, before they become lovers.