In Stephen King's Pet Sematary, identify internal characteristics (they are based on personality and other traits that can't be physically seen) of Louis Creed. (Reference details from the novel that support these traits.)

The character of Louis Creed in Stephen King's Pet Sematary has a rather dry, morbid sense of humor, demonstrated on a number of occasions throughout the novel. For example, when, in chapter 1, he is driving to his new house and passing the landmarks he expected to pass, he thinks to himself that "all the landmarks are right like the astrological signs the night before Caesar was assassinated." According to Shakespeare, Caesar was assassinated after ignoring signs, astrological and otherwise, like men on fire walking along the streets, a nocturnal bird shrieking during the day, and the people of Rome washing their hands in streams of blood pouring from Caesar's statue. That Louis Creed should make such a macabre allusion right at the beginning of the story, and to describe something so inconspicuous as a house within commuting distance of the university, immediately suggests that his sense of humor is, to put it euphemistically, a little odd. The allusion also, of course, rather ominously foreshadows what is to come later in the story.
Another occasion in the novel where Louis's morbid sense of humor is evident is in chapter 6, when Louis is in the shower, washing off the dirt from a terrifying experience that he has just awoken to discover was not, as he first thought, a dream. After washing away all of the dirt, Louis thinks to himself that "this was how murderers must feel when they believe they have gotten rid of all the evidence." At this thought, Louis begins to laugh hysterically, unable to stop. When his wife calls up to ask what he is laughing at, he responds, "Private joke," while still laughing.
Another characteristic that Louis demonstrates throughout the novel is a difficulty in controlling his temper. In chapter 2, for example, he "struggle(s) with his temper" while his daughter, Ellie, is crying because she has cut herself. After she continues crying out, Louis tells her to "stop that or your ass will sting." In chapter 28, Louis becomes "sickly furious" after his wife tells him that her parents have bought new clothes for Ellie. Louis interprets this seeming generosity on the part of his parents-in-law as a cynical attempt "to buy his daughter's affection by unlimbering the world-famous checkbook." Louis's rage in this moment is so acute as to render him momentarily "inarticulate," but he "feels himself on the verge of shouting" that he loves his daughter more because he has brought her cat back from the dead. A few chapters later, in chapter 35, Louis loses his temper with a cat that refuses to leave his son's room, and so throws a toy locomotive "at the cat as hard as he [can], furious at it."
A third characteristic that Louis Creed demonstrates is a capacity for sadness and melancholy. In chapter 4, for example, he is described as feeling "sad and depressed" as he watches the movers carrying "boxes and dressers and bureaus" into the new house. He sees the contents of these boxes as representing the ten years of marriage with his wife and feels that it is all now "Just a bunch of stuff in boxes." Louis's often difficult, strained relationship with his wife is a source of sadness at other points in the novel too. After an argument between him and his wife in chapter 10, described as "surely the worst of the lot," Louis is described as "sad and angry and unhappy all at the same time." He thinks of the relationship at this point as "all so pointless" and speculates that it won't be long, after more arguments like this, "before the marriage sustain[s] structural damage."