Direct characterization occurs when the narrator of the novel or story describes in great detail what is the physical description of the character. This includes the character's unique traits as well as any visible behaviors that make the character stand out.
In the story "The Necklace" Monsieur Loisel is first described as a
little clerk of the Ministry of Public Instruction
We are also told that he wants to get a gun, that he looks bewildered at his wife's issues and that, when he does not find the necklace that his wife lost in the party he is directly described a well.
Loisel returned at night with a hollow, pale face. He had discovered nothing.
It is mainly indirect characterization that we get regarding Monsieur Loisel: from his complaisance, the tolerance of his wife, and the happiness that he seems to have from the simplest things leads the reader to realize that he is, in fact, a good man who paired up with a completely wrong woman.