Gilbert is a reserved, stoic and stern man who is stated to be incapable of loving anyone or being loved by someone else. Being a soldier, Gilbert was required to suppress his sentiments and pleasures, so he feels like he isn't allowed to show his genuine emotions. He feels like he cannot say what he wants to; he didn't have the right to nor does he think that he deserves to. When he doesn't, however, feelings of guilt, regret, bitterness, frustration, anger, and sorrow would mix in his head.