Characterization has several degrees of deepness, regardless of the complexity of the story. If a story is based on psychological elements, the characters must be deep; if the actions performed by the characters are more important, however, the author might choose to put the psychological deepening aside during the characterization. In a novel, the author applies his knowledge of the characters’ reactions based on their relevance to the general development of the story. These reactions must be, every time, directly related to the stimulus that originates them. If a reaction seems illogical before a given situation, the writer usually explains his reasons by intertwining subsequent facts and behaviors.